Hi Guys, new to this forum. My 12v source drops on my boat when the engine cranks. This drops my GPS unit off line. I thought about putting a Cap/diode in line to fix this. I read an earlier post on a similar situation but I don't know if the components would be the same(-my-car-12v-constant-switched-live-drops-volts 12v+drop) The GPS calls for 10-20vdc, 650ma draw. Any help would be appreciated.