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Action to avoid collision

All actions for avoiding a collision such as alteration of course, speed or a combination of both, shall if possible be distinct and performed in good time.

If there is sufficient sea room an alteration of course may be the most effective action.

The result of the action shall be monitored until the other vessel is finally clear.

If more time is needed to assess the situation, reduce speed or stop.

A vessel with the “right way” must also take action if no measures are taken from the other vessel and risk of collision is imminent.

Narrow channels

In a narrow channel, keep as close as possible to starboard.

Vessels less than 20 metres and sailing vessels shall not impede the passage of larger vessels.

A vessel engaged in fishing shall not impede another vessel navigating in a narrow channel.

A vessel crossing a narrow channel shall not impede another vessel navigating in the channel.

Navigate with caution when approaching such a bend of which the area behind it is obscured.

Avoid anchoring in a narrow channel.

Traffic separation schemes (tss)

A very important rule that covers areas of the oceans that have been internationally agreed to have a TSS covering them. A TSS is, essentially, a “road map” marked on a navigators chart, which shows roads (or lanes), the lane a ship must take when going in a given direction and how she must behave within the TSS. The TSS coverage areas are usually areas of high traffic density; hence this attempt to “regulate” the traffic. Ships are not bound to use the TSS all the time, but whenever they do or are in the vicinity of a TSS, they must follow Rule 10.

When navigating in a traffic separation lane follow its direction and, if practicable, keep clear from the separation zone or line.

Normally join or leave at entrances, but when doing it from the sides the “attack angle” should be as close to the lane as possible.

If crossing a traffic lane is unavoidable, the crossing shall be done at an angle as close as possible to 90 degrees to the lane, presenting a full profile to ships within the lane. The aim should be to cross as quickly as possible.

Vessels with a length over 20 metres are recommended to use available traffic lanes instead of inshore traffic zones, but vessels under 20 metres of length and sailing vessels may in all circumstances use the inshore traffic zones.

Entering the separation zone is only allowed when crossing, joining or leaving the lane, in case of emergency or when fishing inside the zone is intended.

Navigating at the ends of the separation should be performed with caution.

Anchoring in a traffic separation scheme or near its termination should be avoided.

Vessels that are not using the scheme shall avoid it by as wide a margin as practicable.

Vessels engaged in fishing shall not impede other traffic.

Vessels with a length of less than 20 metres and sailing vessels shall not impede other traffic.

Vessels that are engaged in maintenance or in underwater work, with restricted manoeuvrability may carry out the operation at their own will.