Abstract: A breathing-air tank pressure tracking system includes a housing having lights mounted therein. The lights are spaced-apart from one another and disposed along a line. A pressure sensor is coupled to a tank containing pressurized breathing air. The pressure sensor detects a pressure of the pressurized breathing air and produces a signal indicative thereof. The housing is configured to be coupled to an exterior portion of a dive helmet wherein the lights are positioned in a field-of-view of a user wearing the dive helmet. A controller, mounted in the housing, is coupled to the pressure sensor and the lights. The controller activates selected ones of the lights based on the signal received from the pressure sensor.

Abstract: A man packable, portable sounding kit includes, in one example, at least two balloons and at least two radiosondes each including a tether for connecting a radiosonde to a balloon. A gas container includes gas for inflating the at least two balloons. A fill hose assembly includes a balloon inflation nozzle coupled to a pressure regulator. A data transceiver unit is configured to receive and optionally to rebroadcast atmospheric weather data from the radiosonde. A case houses the balloons, radiosondes, data transceiver unit, gas container, and fill hose assembly.

Abstract: A man packable, portable sounding kit includes, in one example, at least two balloons and at least two radiosondes each including a tether for connecting a radiosonde to a balloon. A gas container includes gas for inflating the at least two balloons. A fill hose assembly includes a balloon inflation nozzle coupled to a pressure regulator. A data transceiver unit is configured to receive and optionally to rebroadcast atmospheric weather data from the radiosonde. A case houses the balloons, radiosondes, data transceiver unit, gas container, and fill hose assembly.