Re: Is the C&C 30 MK1 a capible offshore boat?
What you're suggesting is more 'coastal harbour hopping' than 'off shore' sailing. Your boat should be fine for that, esp if you're careful about the weather you choose to go out in.
Off shore sailing is generally considered to be crossing oceans or major bodies of water, usually involving several consecutive overnight sails.
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)