The United States Power Squadrons offer a group insurance program
(I think through St. Paul Mutual??) to USPS members. My abbreviated
market search from 3 years ago yielded the following estimates:
[previous insurer, forgot name, for good reason]: ~$700++ per year
State Farm: ~$314/year (I carry auto and homeowners with State Farm)
USPS: ~$307/year, discounts for claim free years (premium is $287 this year),
and full replacement cost (not depreciated cost) for the first 5
years on a new boat.
The above amounts are for property damage, trailering damage, and substantial
liability on a 1989 23 foot sunbridge cruiser with 275hp I/O. Layup is
October 1 to April 1. The boat is covered on inland lakes and the Great
Lakes. If I move it from the midwest I must let the insurer know, and I
may get charged an additional premium.
Note that most insurers will give a discount (typically 15%) to boaters who
have completed a boating safety course. The course is a nice way to stay
in touch with boating over winter when the water is so hard the boat draft
is zero. (I know there are rumored to be areas of the country where this
phenomenon is unknown, but God intended boaters to go through the work
of laying up and winterizing yearly.)
Other discounts may accrue for Loran, Halon, CO sniffer, VHF radio, or
other safety equipment. I recommend asking.
Bob Niemi, Astronautics, Madison, WI