Abstract: An underwater diver's instrument case for tethering an underwater watch and depth gauge to a pressure gauge suspended from a hose leading from a regulator mounted on a scuba tank. The case includes a housing formed with a compartment defining pressure gauge and depth gauge cavities. The housing includes a retainer which retains the pressure and depth gauges in their respective cavities. The cover is formed with windows overlying the faces of the respective gauges to enable viewing thereof. Thus, the case may be conveniently mounted to a pressure gauge conventionally suspended from a scuba diver's air regulator by means of a hose and the depth gauge will be readily available for convenient viewing during a dive much the same as the pressure gauge.

Abstract: A diver distress signalling device that has two separable dye containing elements. The device is strapped to a diver and includes an actuating mechanism. Upon actuation, the dye from one of the elements is released in the vicinity of the diver, while a float carries the other dye container to the water surface, streaming a trail of dye behind it. At the surface, dye is emitted to color the water in the vicinity of the float.