Tired of the unimersive Mitch at the Last Plank who clearly sounds like an old sailor but looks like a biker boy?
Hoist the sails and fish 'n chips, here is the new more immersive sailor-like Mitch!
A more rough-faced, older (and with a new outfit) Mitch is ready to take your order.
Arr!

Setup: Place the Esp-File into the games data directory (Fallout 4\Data)
Uninstall: Just remove the Esp!

Requires Fallout4 and the Far harbour-DLC, nothing else!
(I did not manage to change the facial expression or the pitch of his voice, which may be subject to future updates!)