This is the PADI Underwater Navigation Diver Crew Pack What you learn: Navigation patterns Natural navigation (without a compass) Compass navigation How to mark" or relocate a submerged object or position from the surface Underwater map making How to follow irregular courses with the Nav-Finder Dive site relocation How to estimate distance underwater What&';s Included: PADI Specialty Underwater Navigator Manual and Navigation DVD Master the challenge of Underwater Navigation! "