Originally posted by Daniel
Are speed limits generaly over ground or through water? I usually twist it to fit which ever suits, but don't know which it's supposed to be!
Good question! On the Thames, they appaently do timings from the banks, so SOG counts (bit rough if you're going downstream!), but places like estuaries are radar'ed from launches, so they're affected by the tide at the same rate as you... until one day they anchor before using the radar gun
Good point about wash though - most places seem to have a similar rule, if you're making a wash, then you're going too fast
(Well, just imagine that your RIB is moored that pontoon, chafing the tubes against the side as the wash hits it)
OK - so what do you do if you're entering entering a speed restricted estuary (eg 8kts max) with 12kts wave (2m high) of following sea pushing you in ??