4/1/2023 0 Comments Aquadine diving![]() ![]() The collector market for all types of items has exploded in recent years. How do I know the helmet I'm about to bid on is the real thing? DESCO Air Hats share(d) the market with the likes of KM Superlites™, Miller, Savoie, Gorski, CBE, and Aquadyne. Low volume helmets are available in free flow and demand models. One to four windows of various shapes can be installed. The top and breastplate are one unit permanently joined. the helmet rests on the diver's shoulders and air exhausts from under the breastplate. These helmets are the simplest and easiest to use of all helmets. Morse, Schrader, and DESCO all made helmets of this style. American lightweight helmets, Asian helmets, and some European helmets used this pattern. The Sponge collar is the most universal of the three. ![]() The Commercial collar looks looks a horse collar. The Mark V and Sponge resemble each other but the Mark V is larger overall. First i the Mark V collar which obviously is used with a USN Mark V Helmet. There are three standard collar patterns. The collar shape conforms to the breastplate, slipping over the brail studs, and is squeezed between the brails and breastplate. this is accomplished with a gasket known as a collar. The helmet needs to mate to a dress for a watertight seal. It also has a double exhaust valve using a Mark V exhaust primary and a fixed flapper secondary exhaust. The Browne Commercial helmet has large screw in Acrylic windows, an integrated air control valve, and a low profile air inlet/communications block. The Lightweight Fisheries has the Mark V exhaust valve. Agar helmets have rings without bars for the windows and a adjustable single spring head butt exhaust. DESCO makes the Abalone, Agar, Fisheries, and Browne Commercial helmets on the Sponge breastplate and shell.Ībalone helmets had guards with bars over the windows and a Mark V exhaust valve. Different fisheries had different requirements so various models of helmets developed. The helmet came stock minus communications and with a simple head butt exhaust valve.Īs stated above "Sponge" also referred to a class of helmets. This is the helmet of the Mediterranean Sea and the Florida Keys. Sponge helmets are cheaper and easier to maintain which appealed to frugal Greeks and Conchs. Sponge divers would spend most of the day underwater and having the lightest gear possible would reduce fatigue. The Sponge helmet was developed for divers harvesting sponges. The name Sponge Helmet refers to a particular model of helmet but is also used as a generic term for lightweight helmets which use the same breastplate and top shell. Variants of the commercial helmet include the Fisheries Helmet with a single large window, and the Nuclear with a plastic screw in front window, Helium helmet exhaust valve, and integrated air control valve. The commercial shell is often referred to as a bubble shell. The helmet shell shape is different than a Mark V. After the Mark V came out exhaust and communications from it became available on commercial helmets. Optionally a top window could be installed. The side windows are generally oval and can be oriented horizontal or vertical. Three lights (windows) front screw in, and sides were standard. It is constructed to take rigorous use so the Copper and Brass parts are all made heavy. The breastplate is a twelve bolt type (meaning 12 studs pass through the collar and brails) which is very wide across the shoulders, falls fairly deep in front, but falls shorter in the back. The commercial diving helmet traces back to the mid 19th century. Low volume helmets can be divided into free flow, demand, and mixed gas variants. Other types include shallow water and low volume helmets. Most common are the commercial and the sponge or lightweight helmets. While the Mark V helmet is the best known, other types of helmets preceded it. Helmet Identification Types of Diving Helmets ![]()
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