This is the Oceanic Swivel Wrist Mount SWIV Compass

Features:

• Reliable Underwater Navigation
• Large, Easy-to-Read Bearing Indicators
• Great in Limited Visibility
• Liquid Filled Compass
• Top and Side Reading Capabilities
• Side Reading for Gun-Sight Accuracy
• High Visibility Lubber Line
• Large Ratcheting Bezel with Direction and Reciprocal Index Points
• Luminescent Display
• Precision Jeweled Bearing
• Strong Magnets for Quick Response and Accuracy
• Compass Headings in 30° Numbered Increments
• Indicator Marks for Every 10°
• Twin Heading Indicators for Alignment of Compass Course

The SWIV is a dual-purpose compass. The convenient side scan window allows quick reference of large, easy-to-read bearing indicators on a luminescent display for gun-sight accuracy. Or, for divers who prefer relative navigation, the ratchet bezel can be rotated easily even with thick neoprene gloves.