Should I tip the crew?

It is good practice to tip your crew 5-15% of the booking price. So, if service was good, tip 5% or if it was amazing, tip closer to 15%

Give the gratuity at the end of the sailing holiday to your skipper and they will distribute it among the crew members.

Read Tipping your Crew: Why? How much? When to get a deeper explanation and discussion of tipping etiquette.