To the OP, yes for a lower cost option this summer we've been experimenting just using our iPhones with earphone headsets and calling each other right before docking or whatever. It actually works quite well.
The only pain was the wire dangling so for our next cruise we've invested in wireless Bluetooth headsets; they can be had from Amazon in the $35 price range with decent quality. So far they work well on land and I can let you know how it goes after we try them on the boat later this week.
The only pain was the wire dangling so for our next cruise we've invested in wireless Bluetooth headsets; they can be had from Amazon in the $35 price range with decent quality. So far they work well on land and I can let you know how it goes after we try them on the boat later this week.