The RNLI has lifeguards on more than 160 beaches 
Outdoor electronics refers to electronics device Sextants
There are three steps to adjusting your sextant: index mirror adjustment, horizon mirror adjustment, and index error adjustment and calculation. The index arm of the sextant can move in relation to the body by turning the micrometer drum or by squeezing the spring-loaded quick release levers. The levers free the fine adjustment screw in the interior of the index arm and allow it to be moved quickly to any angle. Be sure to squeeze the levers completely so that the screw clears the gear rack on the underside of the sextant. Release the levers and turn the micrometer drum at least one full turn to ensure that the screw has meshed fully with the gear rack. An incorrect reading may be obtained at the drum if this is not done. We have a comprehensive range of Marine Sextants to suit all requirements from a basic Standard Mark 3 Sextant to the Master Mark 25 variety. Also included are our Wind Speed Indicators. The range includes Micrometer Master Sextant Mk 15, Micrometer Master Sextant Mk 25, Sextant (Standard Mark 3), Wind Wizard Wind Speed Indicators.
