Trove Island

Alas, though you have sailed the Seven Seas and successfully reached the fabled Trove Island, ye must first answer five questions to prove that ye be worthy of claiming the lost treasure of the Tempest.

1. What is the Blackheart's name?

2. What is the date when the mariner tells his tale?

3. How many men were aboard the Tempest when it left port?

4. What is hidden in the bottom design on the back of the map?

5. What does the following pirate code say?
Hint: 'Tis the one instrument that is essential to performing the Gallow's Jig.
* Type yer name and email address, then toss thee bottle to send yer message. And thar's to be no cheating, ye filthy scallywags!