You can learn to dive in Cozumel, in 4+ days. We know, that as a crew member, not always easy to touch the land, so taking scuba lessons were literally impossible during your contract. But in Cozumel, our flexible instructor team and tailor made courses are now available, especially for cruiseship crew members. You can learn dive theory independently, than take 4 occasions in the water with our qualified master instructors in any days you are in Cozumel.
For details message me at marikpeter at gmail. Cheers!