We lived aboard for 6 years here in Seattle on 60' DeFever, and tried cheap walkie talkies that were ok on ski slopes, but worthless on a boat, expensive Motorola VOX walkie talkies that barely functioned with big Detroit diesel noise aft, then last Spring finally ponied up for Eartech Ultralights from Amazon. These arrived quickly, work perfectly, filter out engine noise, no problem with my hearing aids, and easily mute by flipping up the mike boom whenever one of us wanted to talk to a guest or dockhand. Must make sure to turn off between docking events (easiest to simply take out batteries to be sure) or dead headset battery after anchoring overnight in Andrews Bay.
Sadly, my wife of 38 years was killed in August by a drunk driver as she walked our two small dogs near our marina. A dock neighbor recently used the Eartech while helping me go get my fuel tanks filled for winter heating, and the crystal clear communication made each docking really easy and impressed him too.