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Navigation

Navigation. Introduction Equipment Surface Positioning Measuring Distances Underwater Natural Navigation Compass Navigation. Good divers navigate effectively. Why you should become proficient with UW Navigation?. Successful Navigation Reduces confusion and anxiety

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Navigation

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  1. Navigation • Introduction • Equipment • Surface Positioning • Measuring Distances Underwater • Natural Navigation • Compass Navigation

  2. Good divers navigate effectively

  3. Why you should become proficient with UW Navigation? Successful Navigation • Reduces confusion and anxiety • Avoids long surface swims at the end of a dive • Increases the effectiveness of the dive plan • Reduces air consumption

  4. Equipment Instrument Console • Submersible Pressure Gauge • Depth Gauge • Compass

  5. Equipment Submersible Pressure Gauge

  6. Equipment Depth gauge

  7. Equipment Timing device

  8. Equipment Compass

  9. Surface Positioning • A “fix” allows you to relocate an underwater site – useful for beach dives

  10. Measuring Distances Underwater • Several methods may be used to estimate distance • Most accurate • Most common

  11. Measuring Distances Underwater One of the most accurate and most common

  12. Measuring Distances Underwater Most accurate

  13. Measuring Distances Underwater Most common

  14. Natural Navigation Relies on the Diver making pre-dive observations as well as while diving • Common Observations: • Waves, currents and tidal movement • The angle of the Sun • Offshore objects and/or formations • Depth readings

  15. Natural Navigation Utilizes Natural References • Light and shadows • Water movement • Bottom composition and reef formations • Bottom contour • Plants and animals • Noise

  16. Natural Navigation The procedure: • Use starting references • Follow a pre-planned general course • Move forward by moving from aid to aid • Develop a desire to remember

  17. Compass Navigation Know how the compass works and how to set a course

  18. Compass Navigation • Magnetic North Needle • Lubber or Reference Line • Rotating Bezel • Witness Marks • Headings

  19. Learn how to deal with cross current • How to navigate to a general location • How to navigate to a specific location with a known sea floor

  20. Hints for better navigation • Plan your dive and dive your plan • Trust in your compass • Use natural references • Allow for the effects of current • Share responsibilities • Understand the limitations of the compass • Swim slowly

  21. What to expect on the Navigation dive in the keys Swim the following patterns: • Run a measured line in both directions • Compass – out and back • Natural Navigation – out and back • A Square • Use the compass during the dive • Have fun

  22. Navigation End of Unit 3 • Introduction • Equipment • Measuring Distances Underwater • Natural Navigation • Compass Navigation • Surface Positioning

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