Last two boats I have raced offshore
& delivered have had the comar receiver and splitter. It's a good piece of kit.
Three things I'd consider:
1. Consider spending a bit more and going for the Transponder - you can see the big ships, the problem is that they may not see you.
2. For the price
of the splitter, you can almost get a 2nd VHF
ariel. Then you don't have the dilema of "do I listen to 16 or do I see what ships are around?" You can't do both. Having said that, it's only really a problem in very congested water
ways (for me - Singapore
- you really need to be on both at the same time - we used handheld vhf and AIS permanantly on)
3. Consider 2nd hand. ISAF have just made AIS Transponders a requirement for Cat 1 races. There are a lot of race
boats getting rid of their Recievers at the moment - ask around.