Marine Captain is the essential app for all Boat owners and users. Marine Captain makes the most complex Nautical calculation simple by taking out all the calculation work and presenting the user with immediate usable information. Information provided includes: 1. Course to steer Calculation - correcting for tides and currents from any direction, 2. Current deviation Calculations - showing course deviation amount if course uncorrected. 3. Journey time calculator. 4. Calculate boat speed without the use of Knotmeter. 5. Depth calculator. 6. Swing radius of Anchored Boat. 7. Chart scale conversions.