Given the tools God gave you and those that can be bought from landfall navigation supplies, don't you think that knowing the minimum distant from a ship of any kind, along with the tools mentioned above, that you should be, not only able to, but expected to, know whether or not your current heading is safe ?
After all they are limited in where and how they can proceed too and from port, so you could theoretically figure it out in your head while sip'n that coffee
1978 Tayana 37
Freedom comes when youíre ready to sail away. True freedom comes when you donít have to return
Cut off from the land that bore us, betrayed by the land we find, where the brightest have gone before us and the dullest remain behind, .......but stand to your glasses, steady,.......tis all we have left to prize, raise a cup to the dead already, hurrah for the next that dies