Well, after reading this post, I've suddenly become aware how dangerous it has been to anchor
for 25 years in North and Southern Britanny.
"Bottom is very often rock strewn with sand patches."
Get the Imray Guide (I suppose you cannot read French) and you'll find out that all recommended anchor
spots are sand only; famous ones include the Glenans islands, Houat, Camaret... (North Britanny has fewer such spots)
Letting your boat go dry is a day only business (actually, boats with a lifting keel
are becoming scarce these days). Anyway, in many places, you have to anchor well off the beach (i.e. outside the swimming area that is marked off with yellow buoys).
So most people will select a non drying spot. It is true that you have to pay out a large amount of rode
. But if you pick up a spot which is (say) 12 m deep at high tide, a 3 to 1 ratio is adequate (a 5/7 to 1 ratio is mandatory only when you anchor in a shallow spot. Be aware that a typical French sailor will carry about 50 m of chain on boats from 10 m LOA
upwards, plus a fair length of nylon just in case)
Unless the wind
is wild, most of your chain will be snaking on the bottom and with the night breeze (that runs opposite to the frequent summer sea breeze), your turning circle will be MUCH less than the amount of rode
you have paid out. If the weather
to become nasty, there are a large number of marinas
ready to welcome you, most of them able to accommodate multihulls (give a phone
call or send a text message to make sure). Some places have sheltered mooring
Britanny is a lovely sailing area, but it gets crowded in July and August.
à vous !!!