Message in the bottle

Whoever finds this message:

My name is Skrug, and i was the last survior of this ship. We learned how to navigate the Vortex Arhipelago by using the anchor to control where we go. But our anchor got sucked at the bottom of the great arhipelago. If you want to continue finding the treasure of Skull Island, untangle the anchor from the bottom. 
To be able to navigate the Vortex arhipelago, you will need some things things that will help you.

To be sure you are worthy of this secret, i encoded the name of our ship