Build Your Own One-Man Submarine! (Sep, 1933)

This is apparently the second article in the Modern Mechanix series: “How to kill yourself underwater”. The first being Build Your Own Diving Helmet.

They are seriously talking about getting in this thing and being towed 15-30mph at a depth of at least 30 feet. But don’t worry because “The air inside the boat will be sufficient for approximately half an hour’s stay under water”.

Take Thrilling Underwater Cruise in ONE-MAN SUB

YOU get all the keen thrills of deep-sea diving and underwater cruising in this one-man submarine. Towed by a motor-boat, the novel craft will take you down to a depth of at least 30 feet, where you can explore the river or lake bed. Through a special conning tower you can watch the fish as you dart among them, the while maneuvering about like a real submarine.

Build Your Own Diving Helmet (Jun, 1933)

This is another one of those things that would never get by the liability lawyers today.


Improvement follows improvement in the design of home made diving helmets as amateur divers become more and more acquainted with their use. This one of Hoag’s is the last word in helmets so far published by good old M-M.

ALL the thrills of exploring the lake bottom are yours with this simply constructed diving helmet; and, if you do not dive too deep, you are in no particular danger, either. Besides its use in recovering lost outboard motors at a substantial profit, the helmet will give you one of the most interesting experiences of your life; for until you have breathed and walked at leisure under water, you have missed something. It will take a good deal of nerve to go down the first time, but after that it will just be fun.

LATEST BOATING SPORT… Sailing Midget Ships (May, 1938)

These are really cool. I love the idea of making scale models that you can actually sail around in.

LATEST BOATING SPORT… Sailing Midget Ships


AMATEUR boat builders in many parts of the world are going down to the sea in midget ships. They are putting off in men-of-war, square-rigged traders, ocean liners, and superdreadnoughts barely larger than rowboats, yet reproducing in every detail ships that are famous in nautical history.

Soviet Engineers Building 80-foot “Glider” Boat (Nov, 1937)

Soviet Engineers Building 80-foot “Glider” Boat
SOVIET engineers are constructing a “glider” speedboat for service on the Black Sea. The boat will have two hulls and carry 150 people at a speed of over 40 m.p.h. Four aviation motors of 675 horsepower each will power the novel craft, which will be 80 feet long with a width of 40 feet. A model of the boat has been placed on public exhibition in Paris, France.

Uncle Sam’s School for Sailors (Feb, 1941)

Uncle Sam’s School for Sailors

WHEN you march through the main gate of the Naval Training Station at San Diego, Calif., as a raw recruit you leave the land behind. You will spend two months learning to be a sailor before you are assigned to the battle fleet but even though you are still on dry land, things are a lot like they are at sea.

In a couple of days you will know that a floor is really a deck and you’ll not make the mistake of calling a bulkhead a wall. You will ask whether the smoking lamp is lit instead of whether you may smoke and you will be telling time by ship’s bells instead of by hours.

German Boys Build Scale Model Liners for Sea Cruises (Sep, 1935)

This is the coolest boat model I’ve ever seen. You can ride around in it!

German Boys Build Scale Model Liners for Sea Cruises
EXPERT marine constructionists, between the ages of 9 and 16 are being developed in one of the most novel trade schools of the world at Potsdam, Germany. Under the tutelage of experienced marine engineers, the youths receive a thorough technical training in building exact replicas of real steamships on a scale of one to twenty.
Grades are given according to the aptitude and intelligence shown in building the model vessels. The plans from which the youth work are the same plans, scaled down, of such ships
as the Normandie and the Queen Mary. At the end of the school year, advanced students build models that can actually go to sea.

Glass Cooky Jar Becomes Diving Bell (Sep, 1935)

Glass Cooky Jar Becomes Diving Bell
DIVING enthusiasts for more than a year, the twin brothers, Joe and Jerome Maurice, 17-year-old high school students of Fond du Lac, Wis., invaded their mother’s pantry for their 1935-version diving helmet.
A heavy glass cooky jar was selected to form the bell of the helmet, and thick sheet copper was sealed to this to form the breast plates and shoulder supports for the jar.
Several improvements in construction were added to the new model. The air valve was placed within easy reach of the right hand, with the air hose entering the helmet from below to prevent kinking. The helmet may be swiftly slipped off in the event of accident below water.
The greatest advantage of the cooky jar diving bell is that it permits full vision in all directions with ample safety. Air is supplied through a two-cylinder pump at a pressure of 30 pounds per square inch. At a depth of 35 feet, the helmet functioned perfectly.
The helmet the twins used in 1934 was made from the end of a water tank, with a top air valve and welded port window for observation. The imperfections of this helmet led to the invention of the new one.

Jet Powers Boat (May, 1955)

Jet Powers Boat
Powered by a jet-aircraft engine, a new hydroplane has been built in England for an assault on the U.S.-held water speed record of 178.497 miles per hour. Pilot of the hydroplane is Donald Campbell, son of the late Sir Malcolm Campbell, whose Bluebird held the speed record in the late 1930s. The new craft, also called Bluebird, is driven by the jet discharge into the air, as in an airplane. Steering is achieved with a marine-type rudder. The new Bluebird reportedly has excited the interest of both American and British Naval officials.

BE A FROGMAN! (Jan, 1952)


Join the new national FROGMAN CLUB today. All you have to do is send $1.00—be sure
to include your name and address—and here’s what you get:
1) A miniature pair of Frog: Feet. Can be worn on key chain, lapel or hung on windshield as lucky charm.
2) An attractive membership card.
3) A Frogman decal to be used on your windshield, bicycle or notebook.
4) A booklet on “How To Swim Underwater” and “The Supreme Sport of Spearfishing”.
5) Periodic bulletins on the latest developments in Frogman equipment and news.
6) Complete catalog of Frogman equipment available for purchase.
7) A free coupon for $1.00, which can be used toward the purchase of a pair of regular size Frog Feet, $6.95 or equivalent in value. This is redeemable at your local sporting goods dealer, drug store, auto supply store or toy departments. If no such dealer available in your area, we will handle direct.

BE A FROGMAN — Send your dollar today!

Sea-Net Mfg. Co, 1428 Maple Avenue. Dept. PM-1, Los Angeles, 15, Calif.