This is the Oceanic Compass Module Bungee Mount For Scuba Diving Features: Large, easy-to-read bearing indicators Attached bungee cord makes for easy rigging High visibility lubber line Direct and reciprocal index points OceanGlo luminescent backing Large ratcheting bezel with top or side reading Large, easy-to-read bearing indicators attached to a secure bungee cord for easy rigging. High visibility lubber line. Direct and reciprocal index points. OceanGlo luminescent backing. Large ratcheting bezel with top or side reading.