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Havelock Channel


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Why do a 8 knot speed restriction around Cullen Pt all thru to the marina, when there wouldnt be much , if any, that is not within 200m of the shore.? Surely should therefore be a 5 knot max.?

Including a couple of wicked blind bends. Can the HM do a change like that without rescinding something?

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Yes well it is Marlborough and suppose the Mikhail Lermontov was only trying to make up time.

Surely they then would have gone to A Buoy(?) and said from here on in ignore the 5 knot restriction all the way in.( because a lot of the way in is within 200m of shore)

Cant agree about less wake there.

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Well the simple answer is of course that knots is generally and historically speed through the water, not over the ground.

It only became possible to accurately measure speed over the ground with the advent of GPS which was just yesterday in navigational history terms.

If the tide is going out and you are restricted to 5 knots coming up the channel, it could take quite a while to get there.

 

There is another example in Mapua. Not much point in a 5 knot speed limit when the outgoing current is 6 knots! Hence the existance of a higher speed transit zone which has a max speed of 15 knots (specified as over ground speed)!

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