My Tartan 40 is a 4’9”
draft listed for keel/CB version. With tons of extra cruising
gear above spec, including 200 feet of chain, large
battery bank, genset, larger
engine ,
dinghy on davits- it actually draws 5 feet. So I think it’s reasonable your Tartan would bump about that much.
Like others said,
email Tim Jackett. I’ve found him responsive on questions with my
boat and Tartan just built me a new
rudder this
winter and he gave me install
advice. Also was able to tell me when they switched to vinylester for their
boats (mid 80s) which means my
boat is full vinylester which is probably why it’s held up so well.
There’s always a place that’s too shallow for you. But it seems that a lot of channels on
east coast are dredged to 6 foot MLW so that may affect you.
Great boat though!