Shield Display
Depth and AirPressure automatic analogic built in
display for Ocean Reef Neptune II mask

To check important data (depth and air pressure) while diving, the divers must look at their wrist or console display instruments. With SHIELD DISPLAY this information is brought directly to the mask face shield improving diver comfort and efficiency. The SHIELD DISPLAY is an accessory available for installing on any Ocean Reef Neptune II NIRA, Ocean Reef Neptune II or previous models of Ocean REEF full face or integrated diving masks. It consists of the following:
2 LED displays, inside the face shield (depth displayed on the right and tank pressure displayed on the left), connect to the mask through the regulator/octopus port. Supplied with a quick connector the main electronic unit mounts easily to the tank strap of the BC. The high pressure hose from the regulator first stage plugs into the main unit, which also has a depth sensor. The newly designed "surface air valve" allows the connection of the "shield Display" through this valve but still allows the diver to breathe surface air through the "surface air valve", thereby conserving compressed gas. This valve is now referred to as the "electronic connection surface air valve".

HOW IT WORKS The SHIELD DISPLAY turns on automatically when submerged in water. The main unit connects to the BC Tank Strap. Brightness may be adjusted by a switch located on the "Electronic Connection Surface Air Valve". To accommodate daytime use, nighttime use, low light use of divers personal preference. The LED may be turned off and on during the dive by pressing the button on the quick connection. It will turn on automatically if the tank pressure is low and / or the depth is 40 meters / 120 feet or greater.

AIR PRESSURE The air pressure display has two sets of LED. No digital information is provided. . When the tank is full all displays show green. As pressure decreases the LED at the top turn off. As the air pressure approaches 60 bar/900 psi the tights become red and when the air pressure reaches 50 bar/700 psi the red LED flashes.

DEPTH At the beginning of the dive only the reference bar turns on to indicate the unit is working and displays a depth of 50 meters / 164 feet . As the diver descends past 5 meters/ 15 feet the LED lights as the diver descends past the corresponding depth. At 45 meters/ 148 feet the LED turns red. At 50 meters/ 164 feet the LED red light flashes. It is important to remember that the SHIELD DISPLAY is a support system and it is NOT an alternative to the conventional pressure and depth gauges, or computers. The SHIELD DISPLAY is providing at a glance information allowing the diver to quickly evaluate the general conditions (air supply and depth) of his dive.

_____________________________________________specifications

About underwater communication

Talking underwater requires some special attention

- Talk slowly with clear pronunciation
- Talk briefly
- While you talk, exhale slowly
- Direct the exhaust bubbles from the regulator on the opposite side of the communicator using the directional knob on the exhalation valve of the Ocean Reef Neptune II.

Communication is sensitive to the topography of the diving environment. There could be unwanted sound reflections or reverberations (known as the Larsen effect) particularly in swimming pools. Thermo dines and bubbles exhausting from the regulator, are both sources for interferen- ce. The micro air-bubbles generated during exhaust that deposit on the GSM DAT antenna can in fact cause a drastic reduction in quality and power of the ultrasonic signal. Other obstacles such as rocks or parts of shipwrecks also reduce the quality of the signal, generating a shadow zone where it could be difficult, if not impossible to communicate.