most all mexican marinas will require a copy of your mex liability policy to allow you use of their facilities.its mexican law not US.they don't care if you have comprehensive or collision, thats between you and your bank.Almost all mexican insurance companies are acatully US companies.the largest three are GMAC, GE, and ACE.. an annual liability policy for one year will cost about 100-125$ regaurdless of boat size.google san carlos mexico and their is an online menu where you can purchase your insurance and print it out. also don't forget you have to have a ten year temporary import permit for your boat which can also be purchased online but is fed-exed from mexico city so takes two days to be delivered after purchasing.for those who here the state department warnings about drug wars thats limited to the large border cities only and only if your dabbling in buying weed from the cartel. i reccomend buying US grown weed for patriotic reasons if you have to have it.for the one millon plus US citizens who are semi-permenant residents owning property, houses, and boats in mexico just on the gulf of calif. coasts I can tell you once your 2-3 miles past the border the worry of being a crime victim is less than that of driving in LA Phoenix or San Diego