COLREG = the International Regulations for Preventing Collisions at Sea. In Croatia the exam uses the same rules. You need the meaning, not the article numbers — but knowing a few numbers impresses the examiner.

The two words everything depends on

Rule 5, 6, 7, 8 — the basics the examiner starts with

Head-on situation

Two power-driven vessels meeting nearly bow to bow. At night you see both her sidelights (red and green) plus masthead light(s) in line.

Crossing situation

Two power-driven vessels crossing so that risk of collision exists. The vessel that has the other on her own starboard side must give way.

Overtaking

You are overtaking when you approach another vessel from more than 22.5° behind her beam — at night you can see only her white sternlight, no sidelights.

• The overtaking vessel always gives way — even a sailing boat overtaking a motor boat.
• You stay the "overtaking vessel" until you are finally past and clear. Changing your bearing later does not make it a crossing situation.
• You may pass on either side, but keep a good distance and watch her wash.

Sailing vessel vs sailing vessel (Rule 12)

1. Different tacks: the vessel on the port tack keeps clear of the vessel on the starboard tack.
2. Same tack: the vessel to windward (upwind) keeps clear of the vessel to leeward (downwind).
3. If you cannot tell which tack the other boat is on, you keep clear.

Sailing vessel vs power-driven vessel

• If the sailing boat is overtaking the motor boat, the sailing boat gives way.
• If the sailing boat has her engine running in gear, she is legally a power-driven vessel — even with sails up. By day she must show a black cone, point down.
• In a narrow channel or traffic separation scheme, a sailing boat must not impede a big ship that can only navigate there.
• A sailing boat must keep clear of vessels higher in the order below (fishing, restricted, not under command).

The order of priority (Rule 18) — memorise this list

Fishing vessels

• "Engaged in fishing" means fishing with nets, lines or trawls that restrict manoeuvrability. A boat with trolling lines is not included — she is an ordinary power-driven vessel.
• Every power-driven and sailing vessel must keep out of her way.
• Keep well clear of the side where the gear is — a fishing boat may show an extra white all-round light pointing towards outlying gear more than 150 m long.
• By day: two black cones with their points together (like an hourglass). Small boats may show a basket.

Restricted vessels — practical meaning for you

• NUC: engine failure, no steering. Cannot get out of your way — you move.
• RAM: dredger, cable ship, diving boat, big tow. Watch for the ball–diamond–ball shape and pass on the side that is safe (a dredger shows two balls on the obstructed side and two diamonds on the clear side).
• Diving flag: flag A (blue and white, swallow-tail) — keep at least the distance required by local rules (in Croatia stay well clear, minimum 100 m recommended, and slow right down).
• Vessel aground: anchor light(s) + two all-round red; by day three black balls.

Sound signals — say them exactly

Croatia uses IALA Region A. This single fact decides half the buoy questions: coming into a harbour, red is left, green is right.

Direction of buoyage

Lateral buoys only make sense with a direction. The conventional direction of buoyage is: entering a harbour, river or channel from seaward, and generally clockwise around a continent. In the Adriatic the general direction runs north-west, up the coast. On a chart it is shown by a magenta arrow.

All the marks — tap a light to see its rhythm

The small lamp in each drawing flashes in real time with the true light characteristic. Watch it for one full cycle and count — this is exactly what you do at sea.

The cardinal system — the big exam topic

A cardinal mark tells you on which side to pass: pass north of a north cardinal, east of an east cardinal, and so on. The danger is on the other side.

Emergency wreck marking buoy

A new wreck that is a danger to navigation may be marked by a buoy with blue and yellow vertical stripes, a yellow cross topmark, and an alternating blue and yellow light, Al.Oc.BuY 3s. Pass well clear of it on any side.

Fast recognition drill

Lights are shown from sunset to sunrise, and also in restricted visibility by day. Every question is really asking two things: what kind of vessel is it, and which way is she going.

The arcs — learn the numbers

Every configuration you can be asked

Each card shows the vessel seen from ahead at night, plus what you see from other angles.

Reading the picture in 3 steps

1. Count the white lights. One masthead = under 50 m power-driven. Two masthead in a vertical line = towing, or a ship over 50 m. None = sailing, or you are behind her.
2. Look for coloured all-round lights. Red over white = fishing (not trawling). Green over white = trawler. Red over red = not under command. Red-white-red = restricted in ability to manoeuvre. White over red = pilot boat.
3. Find the sidelights to get her direction. Both red and green = coming towards you. Only green = she crosses left to right → she is the stand-on vessel and you give way. Only red = she crosses right to left → you are stand-on. Only white = you are behind her, overtaking.

Light identification quiz

Look at the lights and choose the vessel. Ten questions, new order every time.

Croatian charts are published by the Hrvatski hidrografski institut (HHI) in Split. In the exam you may be given a chart and asked to read a position, measure a distance, or say which side of a danger you pass.

Latitude and longitude

• 1 degree = 60 minutes (60′), 1 minute = 60 seconds (60″). Modern practice writes minutes with decimals: 44° 52.4′ N 013° 50.7′ E.
• Always write latitude first, then longitude, and never forget N/S and E/W.

A realistic Croatian chart extract

How to read this chart — exactly what the examiner wants

1. Position: go straight left to the latitude scale, then straight down to the longitude scale. Say latitude first.
2. Distance: take the dividers, put them on the two points, and carry them to the latitude (side) scale at the same height. Count the minutes = nautical miles.
3. Course: lay the plotter along the line, read the angle against a meridian or the compass rose. Courses are given in three digits: 043°, not 43°.
4. Time: time = distance ÷ speed. 3.4 NM at 6 knots = 0.57 h ≈ 34 minutes.

Bearings and the compass

• True bearing (°T) — measured from true north (the chart's north).
• Magnetic bearing (°M) — measured from magnetic north. Difference = variation (in the Adriatic roughly 3° E, shown in the compass rose).
• Compass bearing (°C) — what your own compass shows. Difference from magnetic = deviation, caused by iron and electronics in your own boat.
• Relative bearing — measured from your bow: 000° ahead, 090° on the starboard beam, 180° astern.

Scale

• Scale 1 : 100 000 means 1 cm on paper = 100 000 cm = 1 km on the sea. Good for passage planning.
• A large scale chart (e.g. 1 : 15 000, a harbour plan) shows a small area with much detail. A small scale chart shows a large area with little detail.
• Rule: always enter a port on the largest-scale chart available.

Depths and heights

Symbols you must recognise

Planning a safe route

1. Draw straight legs between waypoints, well clear of dangers — a good habit is at least 0.3 NM off the coast and off any rock in open water.
2. Check the depth along the whole leg, not only at the ends.
3. Note which side you pass each buoy, and its light for night.
4. Write down course, distance and estimated time for each leg.
5. Pick a clearing bearing or a leading line where the entrance is narrow.
6. Always have an escape plan: the nearest safe port or shelter if wind gets up.

The examiner will almost certainly ask: “What is bora and how do you recognise it?” Know the four main winds, their direction, their warning signs, and what you do about them.

Thunderstorms and the “nevera”

• Signs: tall dark cumulonimbus clouds building over the sea in the west, a sharp fall in temperature, a strange stillness, distant thunder, a low dark line on the horizon, wind suddenly shifting.
• Action: get into shelter early — an hour early is fine, five minutes late is not. If caught: everybody in life jackets, close hatches, secure loose items, head into the wind and waves at slow speed, keep away from a lee shore, do not anchor on a rocky lee coast, use the VHF only if you need help.
• Lightning: stay inside, keep away from the mast and metal parts.

Fog

• Not common in the Adriatic in summer, more in spring and autumn, and in bays and river mouths in the morning.
• What you must do: reduce to safe speed, post an extra lookout, switch on navigation lights, make the correct sound signal (power-driven, making way: 1 prolonged blast every 2 minutes), use radar/AIS if fitted, and note your position on the chart.
• Remember Rule 19: in restricted visibility there is no stand-on vessel. Avoid altering course to port for a vessel forward of your beam.
• If in doubt, stop and let the fog pass, or anchor clear of the fairway.

Wind warnings and the Beaufort scale

Where to get the forecast

• VHF: the Croatian coast radio stations Rijeka Radio, Split Radio and Dubrovnik Radio announce weather on Channel 16 and then broadcast it on a working channel, in Croatian and English, several times a day.
• Harbour master's office and marinas post the daily forecast on a board.
• DHMZ (the state meteorological service) and marine apps for planning.
• Always check the forecast before departure and again during the day. The examiner wants to hear that sentence.

Safety questions are the easiest marks in the exam — they are pure memory. Learn the equipment list and the four drills below word for word.

Mandatory equipment

The exact list in Croatia depends on the navigation area of the boat (how far from the coast she may go) and her size. For a Category B boat operating in the territorial sea you must be able to name:

Life jackets

• One for each person, of the right size, stowed where everyone can reach them fast — not locked away.
• Buoyancy is measured in newtons: 50 N (buoyancy aid, sheltered water), 100 N (basic life jacket), 150 N (offshore, turns an unconscious person face up), 275 N (heavy weather/with equipment).
• A proper life jacket has: a whistle, retro-reflective tape, often a light and a crotch strap.
• Wear them: at night, in bad weather, when the sea gets rough, in a small boat, when alone, and always for children and non-swimmers.
• Check the gas cylinder and the automatic inflator of inflatable jackets once a year.

Fire extinguisher

• Most common on boats: dry powder (ABC); also CO₂ for engines and electrics. Powder works on solids, liquids and gas fires.
• Never use water on a fuel or electrical fire.
• Check the pressure gauge (needle in the green), and have it serviced/inspected at the prescribed interval.
• Use it with P.A.S.S.: Pull the pin · Aim at the base of the fire · Squeeze the handle · Sweep side to side. Attack from upwind.

Distress signals — know at least six

Emergency procedure — the general pattern

Person overboard (MOB)

1. Shout “MAN OVERBOARD, port/starboard side!” so everybody knows.
2. Throw the lifebuoy immediately, and anything else that floats, to mark the spot.
3. One person points at the casualty and never looks away and never stops pointing.
4. Press MOB on the GPS (or note the position).
5. Turn the boat — turn towards the side the person fell (this swings the propeller away from them). Reduce speed.
6. If you lose sight of them or need help: MAYDAY on Channel 16 (or PAN-PAN if the situation is under control).
7. Approach from downwind/downsea, slowly, and stop the engine (or put it in neutral) before they come near the propeller.
8. Recover them over the lowest point of the boat, keeping them as horizontal as possible; use the bathing ladder, a line, a sling.
9. Treat for hypothermia and shock: dry, warm, lying down, no alcohol, no rubbing; call for medical advice.

Engine failure

1. Check you are not drifting into danger. If you are, anchor — the anchor is your brake.
2. Quick checks: fuel level, fuel cock open, kill cord in place, gear in neutral, battery switch on, air in the fuel (bleed a diesel), water filter / weed on the propeller, overheating alarm.
3. Show the right signal if you cannot manoeuvre: two black balls by day, two red all-round lights at night (not under command).
4. If you cannot fix it: call for assistance on Ch 16 with PAN-PAN, or ask a passing boat for a tow.
5. Only use MAYDAY if the drift is putting lives in danger (rocks, gale, taking water).

Fire on board

1. Shout “FIRE”, life jackets on, count the crew.
2. Stop the engine, close the fuel supply and the gas bottle, switch off the electrics.
3. Turn the boat so the wind blows the fire away from the rest of the boat (put the fire downwind).
4. Attack the base of the flames with the extinguisher (P.A.S.S.). For an engine fire: do not open the engine hatch wide — use the fire port or open just enough to inject the extinguisher.
5. Send a MAYDAY early — a boat fire spreads in minutes.
6. Prepare the life raft / dinghy and the abandon-ship bag. Abandon only when you must, and only into a raft, upwind of the fire.

Taking on water (leak / flooding)

1. Find where the water comes from — hull, seacock, hose, stern gland, or waves over the deck.
2. Stop or slow the flow: close the seacock, plug the hole with a bung, cushion, sail bag, towel — anything, pushed from inside.
3. Pump: electric bilge pump on, hand pump, buckets. Water in fast = many hands bailing.
4. Reduce the pressure: slow down, and if possible turn so the hole is on the high side, out of the water.
5. Send MAYDAY if the water is winning, before you lose electrical power.
6. Consider running the boat onto a nearby shallow, sandy shore rather than sinking in deep water.
7. Prepare life jackets, life raft, EPIRB, flares, phone — before you need them.

Grounding

1. Stop the engine immediately (protect the propeller and cooling intake).
2. Check for injuries, then check the bilge for water.
3. Note the tide and wind; work out if you went on going forward — usually reverse gently out the way you came.
4. Reduce draught: move crew and weight, heel the boat.
5. If you cannot get off, or the hull is damaged, call PAN-PAN (or MAYDAY if lives are in danger).

Category B includes a radio part. Learn the three priority words, the MAYDAY format, and be ready to speak a distress call out loud in front of the examiner.

The basics

• VHF works line of sight — range from a small boat is roughly 10–25 NM to a coast station, less to another small boat. Range depends on antenna height.
• Channel 16 (156.800 MHz) — distress, urgency, safety and calling. You must keep a listening watch on 16 whenever the radio is on and you are underway.
• Channel 70 — DSC (digital) distress alerting only. Never speak on 70; you press the red DSC button.
• After making contact on 16, change to a working channel (e.g. 06, 08, 72) to continue the conversation.
• Ch 06 is reserved for ship-to-ship safety and search and rescue coordination. Ch 13 is bridge-to-bridge navigation safety.
• Power: use 1 W for nearby stations, 25 W for distance. Speak clearly, slowly, and press the PTT button before you start speaking.
• Never transmit false alerts, never use the radio for private chat, never block Channel 16.

The three priority signals

The MAYDAY format — the exam favourite

Realistic dialogues

Procedure words — use them exactly

Phonetic alphabet — learn at least your own boat name

Alfa · Bravo · Charlie · Delta · Echo · Foxtrot · Golf · Hotel · India · Juliett · Kilo · Lima · Mike · November · Oscar · Papa · Quebec · Romeo · Sierra · Tango · Uniform · Victor · Whiskey · X-ray · Yankee · Zulu

Numbers are spoken digit by digit, and the decimal point is said as “decimal”: 44.7 = “four four decimal seven”.

The examiner may put a rope in your hands. Four knots are enough: bowline, clove hitch, round turn and two half hitches, figure eight. Press Play to watch the working end travel, or step through with the numbers.

You do not need to be a mechanic. You need to name the checks in the right order and know the three things that stop an engine: no fuel, no cooling water, no electricity.

Pre-departure checks — say them in this order

1. Weather forecast and your plan; tell someone ashore where you are going and when you will be back.
2. Documents: boat papers, your licence, insurance.
3. People: how many on board, are they within the certificate limit, life jackets fitted and reachable.
4. Safety equipment present and in date: jackets, lifebuoy, flares, extinguisher, first aid, torch, anchor, VHF working, horn.
5. Hull and bilge: no water in the bilge, drain plug in, seacocks correct, no damage.
6. Engine: oil, coolant, fuel, belt, battery, cooling water intake clear, no fuel smell.
7. Steering and controls: full lock both ways, gear and throttle move freely, kill cord attached.
8. Navigation: chart, compass, GPS, lights tested.
9. Mooring lines and fenders ready.

Fuel

• Know whether your engine is petrol (benzin) or diesel (dizel), and how big the tank is.
• The one-third rule: ⅓ of the fuel to go out, ⅓ to come back, ⅓ in reserve.
• Refuel with the engine off, no smoking, no electrics, everybody ashore; wipe spills, and ventilate the bilge / run the blower for several minutes before starting a petrol inboard — petrol vapour is heavier than air and explodes.
• Water in the fuel is the classic cause of a stopped diesel: check the water separator / fuel filter. Keep the tank fairly full to reduce condensation.
• A diesel that has run dry must be bled (air removed from the fuel line) before it will start again.

Cooling

• Most boat engines use raw sea water, pulled in through a seacock and a strainer, either directly or through a heat exchanger (indirect cooling with fresh water + antifreeze).
• Check the telltale: after starting, water must come out of the exhaust or the telltale hole within seconds. No water = stop the engine immediately.
• Overheating causes, in order of likelihood: closed seacock, blocked strainer (plastic bag, weed), broken impeller, loose or broken belt, low coolant level.
• Carry a spare impeller and a spare belt. An impeller is destroyed in a minute if it runs dry.

Oil

• Check the dipstick before starting, with the boat level. Level between min and max; top up with the correct grade.
• Also check the gearbox / outdrive oil. Milky, grey oil means water has got in — do not run the engine.
• A red oil-pressure light or alarm after starting: stop the engine at once.
• Two-stroke outboards need oil mixed with the fuel (or an oil tank) in the ratio given by the maker.

Battery

• Check the terminals are clean and tight, and the battery is secured so it cannot move.
• Ideally two batteries: one to start the engine, one for the services (lights, fridge, VHF), with a selector switch.
• Do not run the engine start battery flat — if the radio and lights kill it you cannot start.
• The alternator charges while the engine runs; watch the charge light.

Starting procedure

1. Ventilate the engine compartment / run the blower (petrol).
2. Open the fuel cock and the cooling water seacock.
3. Battery switch ON. Attach the kill cord to your leg or life jacket.
4. Gear lever in NEUTRAL (the engine will not start in gear — and if it did, it would be dangerous).
5. Diesel: turn the key to pre-heat until the glow plug light goes out. Petrol: choke/primer as required.
6. Start. Do not run the starter more than about 10 seconds at a time.
7. Check the cooling water is coming out. Check oil pressure and charge lights are out. Listen for a normal sound.
8. Let it warm up at idle for a minute, then cast off — last line off, then engage gear gently.

This module is pure Croatian national law, and it is where foreign candidates lose points. Learn the numbers.

Speed limits

Swimmers and beaches

• Never enter a marked swimming area (marked with buoys, often orange or yellow).
• Keep at least 50 m away from a marked swimming zone, and give any swimmer in open water a very wide berth.
• Swimmers in Croatia should not go further than about 100 m from the shore outside a marked area — but assume there are swimmers anywhere near a beach.
• Approach a beach only perpendicular to the shore, at minimum speed, and only where it is permitted.
• Water skiing, towed toys and jet skis are only allowed in designated areas, well away from beaches and swimming zones, in daylight, and a person other than the driver must watch the person being towed.
• Divers: keep well clear of a boat flying flag A (blue and white) or a red flag with a white diagonal; slow down and pass at a good distance.

Anchoring

• Choose good holding ground: sand or mud holds well, weed and rock hold badly. Chart symbols: S sand, M mud, R rock, Wd weed.
• Scope: at least 3× the depth with all chain, and 5–7× the depth with rope. More in bad weather.
• Approach into the wind, stop, lower the anchor (do not throw it), fall back slowly, then set the anchor with gentle astern power and check that it holds by taking transits ashore.
• Shapes and lights: one black ball forward by day, one all-round white light at night.
• Do not anchor: in fairways and channels, in port entrances, over cables or pipelines (magenta dashed line on the chart), in prohibited or protected zones, on Posidonia seagrass meadows where it is forbidden, or so close to another boat that you will swing into her.
• Anchor watch: check your position regularly, and stay on board or keep someone aboard in unsettled weather.

Protected areas

• National parks: Brijuni, Kornati, Mljet, Krka (and Plitvice inland). Nature parks: Telašćica, Lastovo islands, and others.
• You must pay the entrance ticket, respect the speed limit, anchor or moor only in the permitted bays or on park buoys, and take all rubbish away.
• Fishing, diving, jet skis and night navigation are usually restricted or forbidden in parks.
• Military and other restricted zones are shown on the chart — do not enter.
• Discharging oil, sewage or rubbish into the sea is prohibited; use holding tanks and shore facilities. Fines are heavy.

Alcohol

Other duties of the skipper

• You are responsible for the boat, everybody on board, and the safety of navigation.
• Carry on board: the boat's registration/permit, your licence, insurance, and (for foreign boats) the vignette and crew list.
• Do not exceed the maximum number of persons or the maximum load written on the boat's certificate.
• You must help anyone in danger at sea if you can do so without serious danger to your own boat and crew — this is a legal duty.
• Report accidents, collisions, pollution or any danger to navigation to the nearest harbour master's office as soon as possible.
• Entering Croatia from abroad: go directly to a port of entry to clear in with the harbour master, police and customs.
• Emergency numbers: 195 — search and rescue at sea (MRCC Rijeka); 112 — general emergency; VHF Ch 16.

Everything that carries the most marks, compressed. Use your browser's print function (Ctrl/Cmd + P) — the pages are formatted to print cleanly.

Cards you answer correctly are removed from the deck. Cards you miss come back. Repeat until the deck is empty — that is real memorisation, not reading.

Each exam has 40 multiple-choice questions, exactly the style of the Harbour Master's written test. The pass mark here is set to 80% — higher than the real one, so that the real one feels easy. Every explanation links to the module section that teaches the topic, and at the end you get a personal review list built from your wrong answers.

Read the question, say your answer out loud, then open the model answer and compare. Speaking is the skill being tested — thinking silently is not the same.

The exam is tomorrow. Do not open anything else. Work through these seven blocks in order and tick them off. Total time: 60–90 minutes.

Block 1 · The nine sentences that must be automatic 10 min

1. Head-on: both alter to starboard, pass port to port.
2. Crossing: the vessel that has the other on her starboard side gives way, and passes astern.
3. The overtaking vessel always keeps clear, until past and clear.
4. Sailing: port tack gives way; on the same tack the windward boat gives way.
5. A sailing boat using her engine is a power-driven vessel and shows a black cone, point down.
6. Priority: Not under command → Restricted → Constrained by draught → Fishing → Sailing → Power.
7. Croatia is IALA Region A: entering, red to port, green to starboard.
8. Cardinals: N continuous, E 3, S 6 + long, W 9 quick flashes.
9. Distress: MAYDAY on Channel 16; urgency PAN-PAN; safety SÉCURITÉ.

Block 2 · Buoys, 10 minutes 10 min

Scroll back to module 3 and cover the labels with your hand. For each drawing say out loud: name → colours → topmark → light → which side do I pass. Do all nine. Then say the cardinal clock trick twice.

Block 3 · Lights, 10 minutes 10 min

Do the light quiz in module 4 twice. Then repeat the five rhymes: red over white fishing at night · green over white trawling tonight · red over red the captain is dead · white over red pilot ahead · red white red restricted instead.

Direction check: both sidelights = coming at you · green only = crossing left to right (you give way) · red only = crossing right to left (you stand on) · white only = you are overtaking.

Block 4 · Croatian numbers 8 min

• 8 knots in the belt from 50 to 300 m off an inhabited coast; about 3 knots in ports and marinas.
• 50 m — do not navigate near beaches and marked swimming areas; enter only perpendicular, at minimum speed.
• 0.5 ‰ alcohol for pleasure skippers; 0.0 for professionals.
• Anchor scope 3× depth in chain, 5–7× in rope. One black ball by day, one white all-round light at night.
• 195 rescue at sea, 112 emergency, Ch 16 radio.
• Licence B: boats up to 30 GT, internal waters + territorial sea (12 NM).
• 1′ of latitude = 1 NM = 1852 m.

Block 5 · Safety drills — say them out loud 12 min

Man overboard: shout · throw the lifebuoy · point and never stop pointing · press MOB on the GPS · turn towards the side he fell · approach slowly from downwind · engine in neutral · recover · treat for hypothermia.

Fire: shout fire · life jackets · stop the engine · close the fuel and the gas · turn so the wind blows the fire away · extinguisher at the base of the flames · MAYDAY early · prepare to abandon.

Flooding: find it · plug it or close the seacock · pump and bail · slow down and turn the hole out of the water · MAYDAY early · consider beaching.

Engine failure: anchor if you are drifting into danger · check fuel, kill cord, gear in neutral, battery, filter, propeller · two black balls / two red lights · PAN-PAN for a tow.

Block 6 · Speak one MAYDAY 5 min

Out loud, with a real boat name and a real position from the chart in module 5. Do it three times until it comes without thinking. Then say what PAN-PAN and SÉCURITÉ mean.

Block 7 · One mock exam 30 min

Do Mock exam 5 in module 14. Review every wrong answer, and only those topics. If you score under 80%, do mock exam 3 as well. Then stop, pack your documents, and sleep.

Never been near a boat? Start here. Five labelled diagrams show you where everything is, and the A–Z list below explains every term used in this course — nautical words and the harder general English. Click any label in a diagram, or click any dotted-underlined word anywhere in the app, to get an instant definition with links to where it is taught.

The boat — side view

Directions on and around the boat

The sailing boat

The marina — mooring lines and berths

Anchoring

A–Z glossary

Search or filter, then click a term. Each entry shows a plain-English definition, a diagram link where one exists, and “Mentioned in” — the modules where the term appears; click a module chip to jump straight there.

Mental sea-time. Pick a vessel, pick a mission, and handle the situations the exam asks about — in a colourful 3D world with wind, waves, day and night. Every vessel handles differently, every mistake is explained with a link back to the module that teaches it. Pass all ten missions to finish the game.