Marine radios in cars
I belong to the USCG Auxiliary & I have a Uniden UM525 VHF marine transceiver in my truck & a Uniden Mystic portable when I am shoreside but I haven't been officially authorized to use either unit even on asignments because you have to take a training course & be certified on any & all equipment in your possesion, I chose not to get into that because there is a lot of responsibilty & aggravation that goes along with being a certified comms officer & all I really purchased them for was for monitoring purposes on my own terms. So the answer to your question is, yes you can purchase, posses & install marine radio equipment in you residence and/or vehicle, however if you choose to start transmitting on same, you damn well better have a very valid reason (NOT EXCUSE) to engage in that activity. Treat it as it should be in those circumstances, a high end scanner & you will stay within the limits any & all applicable local laws, please keep in mind that if you are a CAP member, you are under the umbrella of Homeland Security as I am with USCG Aux. so you have to find out what their guidelines are as they apply to your situation, however as Dave said in his post, you should be addressing this question to your superior officers. Good luck.
FLRAILMAN