Originally Posted by orthomartin
I have crossed twice with north wind and with seas one time 16-20' and the other with seas 12-14' Both times were uncomfortable but never unsafe. Good news is it only takes a small part of the day to get through and then the wave periods lengthen out again.
16-20 feet in the Stream off S Florida? Wow, not for me, you're talking some major 'Marching Elephants', there... Damn, how much wind did you have, that produced those conditions?
If we're to assume the upper end of that range as an accurate measurement of the Significant Wave Height at any particular time, the typical distribution of waves encountered of greater height would roughly be 1 in every 100 could be 30 feet, and 1 in every 1000 might reach a height of almost 37 feet...
You're a FAR braver man than I, that's for sure... (grin)