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Old 09 September 2010, 01:44   #1
Country: Other
Town: Gas station
Make: Bombard
Length: 5m +
Engine: Mercury 60 HP
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onshore, offshore and coastal waters

Does anyone have the definition of what these mean, but i cant find anything that says how far out coastal ends and off shore starts! presumably onshore is purely rivers and lakes use only.

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Old 09 September 2010, 01:51   #2
Country: UK - England
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12Nm denotes the limit UK territorial waters.

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Old 09 September 2010, 06:46   #3
Country: UK - England
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Boat name: The Black Pig / J4F
Make: Avon SR4
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Engine: Mariner 40EM
Join Date: Aug 2009
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You haven't said in what context you want to interpret these terms but a couple of things come to mind:

Safety equipment equipment, flares etc.Inshore - up to 3nm, Coastal upto 7nm and Offshore over 7nm. Also trying looking RYA Boat Safety handbook (C8).

Recreational Craft Directive has a classification (a, B, C, D) based on wind and wave conditions rather than distance. Offshore (b) wind force 8 and significant wave heights to 4m, Inshore (c) force 6 and 2m, Sheltered (d) such as force 4 and 0.3m (occasional 0.5). Note that C and D can be inland depending on the expansive of water and local conditions. Classsification A is for Ocean going vessels.
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