Scripted Drills

Mode

Focused single-rule exercises. Each drill isolates one COLREGS encounter geometry so you can practice the specific rule without the noise of a full open-ended passage. The engine assesses identically — rules are enforced, errors are flagged.

Rule 14

CLEAR

Rule 14 — Head-On

A vessel is meeting you head-on. Both vessels must alter to starboard. Make a bold, early alteration — do not hesitate or turn to port.

head-onpower-drivenclear

1 contact · MV AURORA

Rule 14

CLEAR

Rule 14 — Head-On (Non-Compliant Contact)

Head-on, but the other vessel is NOT altering as required. You must still alter to starboard — do not wait for her to act.

head-onnon-compliantclear

1 contact · MV BOREAS

Rule 15

CLEAR

Rule 15 — Crossing (Give-Way)

A vessel is crossing on your starboard bow — you are the give-way vessel. Keep clear: alter to starboard and pass astern of her.

crossinggive-wayclear

1 contact · MV CALYPSO

Rule 17

CLEAR

Rule 17 — Stand-On (Late Give-Way)

You are the stand-on vessel in a crossing situation. The give-way ship is NOT altering. Hold course and speed first — but be ready to act boldly if she fails completely.

crossingstand-onlate-contactclear

1 contact · MV DELPHIN

Rule 13

CLEAR

Rule 13 — Overtaking

You are overtaking a slower vessel coming up from astern. You must keep clear until finally past and well clear. Do not close the CPA.

overtakinggive-wayclear

1 contact · MV ERIDANUS

Rule 16

HAZE

Rule 16 — Give-Way Inaction (Multi-Contact)

You are give-way in a multi-contact crossing situation. Rule 16 demands early, substantial action. Small or late alterations are not enough — make a bold move now.

crossinggive-waymulti-contacthaze

2 contacts · MV FORTUNA, MV GANNET

Rule 19

FOG

Rule 19 — Restricted Visibility

You are in dense fog. A radar contact is forward of your beam. Rule 19(d) applies: do NOT alter to port for a contact forward of the beam. Reduce speed and alter to starboard if action is needed.

fogrestricted-visibilityradar-onlyrule-19

2 contacts · MV HALCYON, MV IRIS

Rules 13–17

HAZE

Advanced — Mixed Encounters

A complex scenario with simultaneous overtaking, crossing, and stand-on encounters. Resolve each in priority order — safety first, navigation second.

multi-contactovertakingcrossingadvancedhaze

3 contacts · MV JUNO, MV KESTREL, MV LYRA

Ready for the real thing?

Switch to the open-ended passage — emergent traffic, dynamic weather, and a full Southampton → Calais transit where anything can happen.