yet another YM question

[peterb]

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So why not slow to steerage way? the other vessel will pass ahead of you.

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If you both halve your speeds then the collision will still happen, it just won't be quite as hard. If one or both turn to starboard it won't happen at all.

 

[Sans Bateau]

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If one or both turn to starboard it won't happen at all.

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How do you work that out?

If the vessel closing from the port side turns to starboard, they will most likely steer straight at the other vessel. Likewise, if they both turn to starboard, rather than it becoming a closing collision, the vessel (assuming we are still talking here about a fast merchant ship) that was to port is at risk of then coming up behind the slower (sailing) vessel. Or am I missing something?

 

[Richard10002]

[ QUOTE ]
[ QUOTE ]
So why not slow to steerage way? the other vessel will pass ahead of you.

[/ QUOTE ]

If you both halve your speeds then the collision will still happen, it just won't be quite as hard. If one or both turn to starboard it won't happen at all.

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There will always, (usually?), be a combination of alterations of either course, and/or speed, which could still result in a collision.

If both follow the rules, the chances are minimised.

If I am making a "substantial alteration of course, I usually use 45 degrees. If I am slowing down, I usually slow to steerage way.

If visibility is reduced, I continue to monitor the radar, if it's not, I continue with eyeball and bearings as appropriate, both until the risk has passed.

In reduced visibility, if the other guy doesnt have radar, he doesnt know I'm there, so my alteration avoids the collision.