Continuing with my electronics upgrades and questions, as a new to big boats, I am currently doing a retro-fit to our 96 Hunter 376. I currently have a VHF at helm, my question is do I need another at nav. station if I plan to have a portable one as well. We are located in Tx, and plan on doing some Caribbean next year. Have a new C90W with 4kw radar in and just looking for some further advice.