Today’s diving instruments are simple to read and use, and provide all the information the diver needs to safely plan and complete a recreational dive, and even to record the dive in their dive log. Divers need to keep track of some essentials while on a dive; depth, time, amount of air used, and direction. Both electronic (digital) and analog (mechanical) versions of most instruments can be found at your local professional dive retailer. Some electronic instruments combine all or most of the functions necessary into one or a few different instruments.
Today many divers use reliable diving computers to tell them how long and deep a dive can safely be. Dive computers are one of the first pieces of personal equipment a diver should purchase. Introduced in the late 1970’s, dive computers revolutionized diving because they made it easy for divers to keep track of how long and how deep they could safely dive, without having to make more complicated calculations using mechanical instruments combined with a “table” of safe depths and times. The old table method required considerable practice to use, and can still be used as a back-up if needed, but today’s reliable microprocessors help keep track of depth and time, and actually complete the safe depth and time calculations for you. By putting the depth and time data through a rather complex mathematical “algorithm,” a dive computer actually allows the diver to safely stay longer underwater than the older, harder-to-use table method.
While early dive computers were about the size of a small brick, and fairly heavy, they quickly followed the trend of most electronic devices and became smaller as the years passed. Today, it is not unusual to see dive computers about the size of a hockey puck. And many divers wear dive wrist-mounted dive computers so small that they can double as an everyday wristwatch.
Some newer computers even incorporate the submersible pressure gauge to that same compact unit. And some of these “air integrated computers” even use an electronic sender mounted on the regulator first stage to eliminate the hose between the first stage and the computer, further streamlining the diver in the water.
Today’s diving instruments are simple to read and use, and provide all the information the diver needs to safely plan and complete a recreational dive, and even to record the dive in their dive log. Divers need to keep track of some essentials while on a dive; depth, time, amount of air used, and direction. Both electronic (digital) and analog (mechanical) versions of most instruments can be found at your local professional dive retailer. Some electronic instruments combine all or most of the functions necessary into one or a few different instruments.
Today many divers use reliable diving computers to tell them how long and deep a dive can safely be. Dive computers are one of the first pieces of personal equipment a diver should purchase. Introduced in the late 1970’s, dive computers revolutionized diving because they made it easy for divers to keep track of how long and how deep they could safely dive, without having to make more complicated calculations using mechanical instruments combined with a “table” of safe depths and times. The old table method required considerable practice to use, and can still be used as a back-up if needed, but today’s reliable microprocessors help keep track of depth and time, and actually complete the safe depth and time calculations for you. By putting the depth and time data through a rather complex mathematical “algorithm,” a dive computer actually allows the diver to safely stay longer underwater than the older, harder-to-use table method.
While early dive computers were about the size of a small brick, and fairly heavy, they quickly followed the trend of most electronic devices and became smaller as the years passed. Today, it is not unusual to see dive computers about the size of a hockey puck. And many divers wear dive wrist-mounted dive computers so small that they can double as an everyday wristwatch.
Some newer computers even incorporate the submersible pressure gauge to that same compact unit. And some of these “air integrated computers” even use an electronic sender mounted on the regulator first stage to eliminate the hose between the first stage and the computer, further streamlining the diver in the water.
Dive watches are water-resistant timepieces with a means of measuring elapsed time underwater. For recreational open-water diving, a dive watch should be water-resistant to at least 140 feet of depth.
Depth gauges are analog or digital gauges that record current and (usually) maximum depth reached during a dive.
Submersible pressure gauges or SPGs display the amount of air remaining in a scuba cylinder. These can be mounted on hoses of varying lengths or – in the case of gauges used with back-up tanks – they can be mounted right on a regulator first stage.
Underwater compasses can be analog or electronic. For precision underwater navigation, many divers prefer a compass mounted on a combination slate and compass-board that is held in both hands while following a heading.
Depth/Time capsules show current and maximum depths reached during a dive, as well as elapsed time, and they often store such information for a number of dives. These instruments look similar to dive computers, but they do not calculate safety factors. Depth capsules are often used as backup timers, or as primary timers for divers using dive tables to calculate their own bottom times and surface intervals.
Dive Computers automatically track time and changes in depth and calculate safe time remaining in a dive, as well as planning information for surface intervals and allowable times and depths for subsequent dives. Some dive computers are air-integrated and include information on tank pressure, as well as estimated air-time remaining.
Dive watches are water-resistant timepieces with a means of measuring elapsed time underwater. For recreational open-water diving, a dive watch should be water-resistant to at least 140 feet of depth.
Depth gauges are analog or digital gauges that record current and (usually) maximum depth reached during a dive.
Submersible pressure gauges or SPGs display the amount of air remaining in a scuba cylinder. These can be mounted on hoses of varying lengths or – in the case of gauges used with back-up tanks – they can be mounted right on a regulator first stage.
Underwater compasses can be analog or electronic. For precision underwater navigation, many divers prefer a compass mounted on a combination slate and compass-board that is held in both hands while following a heading.
Depth/Time capsules show current and maximum depths reached during a dive, as well as elapsed time, and they often store such information for a number of dives. These instruments look similar to dive computers, but they do not calculate safety factors. Depth capsules are often used as backup timers, or as primary timers for divers using dive tables to calculate their own bottom times and surface intervals.
Dive Computers automatically track time and changes in depth and calculate safe time remaining in a dive, as well as planning information for surface intervals and allowable times and depths for subsequent dives. Some dive computers are air-integrated and include information on tank pressure, as well as estimated air-time remaining.