The warship is now 400m away. You can see it is a large grey frigate with no visible national flag markings yet. It appears to be making 15 knots. What do you do in the next 30 seconds?

A. Go below and call the Coastguard first before attempting any manoeuvre

B. Identify the vessel on AIS if fitted; check radar; try calling on Ch 16 immediately; assess collision risk by checking if the bearing is changing; prepare to take avoiding action under Rule 19

C. Hold course — you have right of way and the warship must give way

D. Tack immediately and sail away at maximum speed — military vessels always have right of way

A. Sounding fog signals (one prolonged blast every 2 min under engine), maintaining a proper radar/lookout, monitoring Ch 16, and reducing speed to minimum steerage way — all required in or near restricted visibility by COLREGs Rule 19

B. Nothing — fog signals are only required at anchor, not underway

C. Maintaining speed and course — you have right of way as a sailing vessel

D. Displaying a radar reflector is sufficient — no sound signals needed for yachts under 20m

A. Five short blasts = the danger signal under Rule 34(d) — the other vessel doubts you are taking sufficient action to avoid collision. You must take immediate, large, and obvious avoiding action

B. Five blasts is a military identification signal — respond with three blasts

C. Five blasts means the warship is agreeing to give way and asking you to maintain course

D. Five short blasts is not a COLREGs signal — it means nothing under the Rules