Submarines & Asbestos

USS Mapiro SS-376

The USS Mapiro was a United States Navy Balao-class submarine; the origin of its name is a fish that is native to the West Indies and Atlantic Ocean areas near Mexico and Central America. Her complement of sailors numbered a total of 81, and she was almost 312 feet in length. Mapiro's armament consisted of 10 x 21-inch torpedo tubes, 24 torpedoes, 1 x 5-inch / 25 caliber deck gun, and four machine guns. She was propelled by 4 x V16 diesel engines driving electrical generators, 2 x 126-cell batteries, 4 x high-speed electric motors with reduction gears, and two propellers. This equipment enabled Mapiro to reach top speeds of 20 knots per hour while surfaced and 9 when submerged. Mapiro could also endure 48 hours at 2 knots at depths of up to 400 feet, and 75 days on patrol. Her range was 11,000 nautical miles at 10 knots while surfaced.

Just Missing War Action

In May of 1944, Mapiro's keel was laid down in Wisconsin by the Manitowoc Shipbuilding Company. She waited six months before being launched, and then another five months for her commissioning. Her fitting out and shakedown took place close to home, on Lake Michigan, and after those test exercises, she traveled to Lockport, Illinois via a floating dry dock. Mapiro was then towed to New Orleans and thus traversed both the Chicago and Mississippi Rivers. It was in Louisiana that she completed final preparations for her maiden voyage to the South Pacific. Finally, Mapiro was deemed ready to set sail on her own, and she embarked on her first trip to the Panama Canal Zone on May 31, 1945. Five days later, she reached Balboa, where she underwent additional training for almost a month. When that was done, Mapiro partnered with sister ship USS Cutlass and sailed to Pearl Harbor, arriving there two weeks later. From there, she was ordered to conduct her first mission on war patrol in the Marianas; ironically, she reached Saipan on the very day that Japan surrendered-August 15.

Valid Contributions in Other Areas

Mapiro was still able to serve her county in the midst of the former battle lines by conducting operations in observation patrol for a few days. However, it was soon time to travel back home, and USS Mapiro sailed to San Francisco, where she was later deactivated on August 25. After almost seven months of being idle, Mapiro was decommissioned on March 16, 1946. The following New Year's Day, she officially became part of the Pacific Reserve Fleet, with Mare Island, California, as her new base. Her career, however, was not over; fourteen years later, she was converted to a Fleet Snorkel submarine, and shortly after, on March 18, 1960, she found another home. Though the Military Assistance Program, USS Mapiro was transferred on loan to the Turkish Navy, who renamed her TCG Piri Reis (S 343). Within two months, she was ready to leave San Francisco for Istanbul. Her journey took her again through the Panama Canal, but this time with a new Turkish crew. Piri Reis arrived in Gölcük on June 23, 1960, and she had her commissioning on the following day. When Turkey decided to purchase her in 1973, Mapiro was struck from the United States Naval Register, but later that same year, the Turkish navy disposed of her.

It might have been frustrating, in a way, for the crew to reach Saipan and be notified that their assistance was not required. But, considering the atrocities of war, the sailors probably quickly realized that there were worse things than time and financial investment in military preparations that were never needed. Their families were probably also greatly relieved that the crew was not placed directly in peril by enemy gunfire. Unfortunately, all sailors were possibly placed in a different type of risk, without even being aware of it. That danger could have been from the potential exposure to asbestos.

During the time of submarine construction, asbestos was considered an excellent flame and heat retardant, and therefore used as additional protection against onboard fires. The Navy tried to provide every possible measure against that threat to its men, realizing a ship's limited resources and escape routes. Asbestos had the added benefits of being lightweight and flexible, so it could be utilized in the small and awkward spaces of fighting vessels. The problem, unknown at the time, was that its sealant could become damaged by repeated jarring or wear and tear. If that happened, tiny asbestos fibers may have escaped, and anyone onboard could have inhaled or swallowed them. It's only recently that medical conditions and diseases have been directly connected to asbestos. Fibers have remained in people's bodies for 40 to 50 years, all the while creating irritation that may lead to serious problems. It's therefore very important for any former sailor of the USS Mapiro see a doctor at the first sign of an unusual physical symptom, and then contact us for additional information.

Submarines Index

USS Albacore SS 218
USS AmberJack SS 219
USS Angler SS 240
USS Apogon SS 308
USS Archer-fish SS 311
USS Argonaut-SM-1
USS Argonaut SS 475
USS Aspro SS 309
USS Atule SS 403
USS Balao SS 285
USS Bang SS 385
USS Barbel SS 316
USS Barbero SS 317
USS Barb SS 220
USS Barracuda SS 163
USS Bashaw SS 241
USS Bergall SS 320
USS Besugo SS 321
USS Billfish SS 286
USS Blackfin SS 322
USS Blackfish SS 221
USS Blenny SS 324
USS Blower SS 325
USS Blueback SS 326
USS Bluefish SS 222
USS Bluegill SS 242
USS Boarfish SS 327
USS Bonefish SS 223
USS Bonita SS 165
USS Bowfin SS 287
USS Bream SS 243
USS Brill SS 330
USS Bugara SS 331
USS Bullhead SS 332
USS Bumper SS 333
USS Burrfish SS 312
USS Cabezon SS 334
USS Carbonero SS 337
USS Hake SS 256
USS Hammerhead SS 364
USS Harder SS 257
USS Hardhead SS 365
USS Hawkbill SS 366
USS Herring SS 233
USS Hoe SS 258
USS Icefish SS 367
USS Jack SS 259
USS Jallao SS 368
USS Kete S 369
USS Kingfish SS 234
USS Kraken SS 370
USS Lagarto SS 371
USS Lizardfish SS 373
USS Loggerhead SS 374
USS Macabi SS 375
USS Mackerel-204
USS Manta SS 299
USS Mapiro SS 376
USS Marlin SS 205
USS Mingo SS 261
USS Moray SS 300
USS Muskallunge SS 262
USS Narwhal SS 263
USS Nautilus-ss-0024
USS Paddle SS 167
USS Pampanito SS 383
USS Parche SS 384
USS Pargo SS 264
USS Perch SS 176
USS Permit SS 178
USS Peto SS 265
USS Pickerel SS 177
USS Picuda SS 382
USS Pike SS 173
USS Pilotfish SS 386
USS Pintado SS 387
USS Pipefish SS 388
USS Pirahna SS 389
USS Plaice SS 390
USS Plunger SS 179
USS Pogy SS 266
USS Pollack SS 180
USS Pomfret SS 391
USS Pompano SS 181
USS Pompon SS 267
USS Porpoise SS 172
USS Puffer SS 268
USS Queenfish SS 393
USS Quillback SS 424
USS Rasher SS 269
USS Raton SS 270
USS Ray SS 271
USS Razorback SS 394
USS Redfin SS 272
USS Redfish SS 395
USS Robalo SS 273
USS Rock SS 274
USS Ronquil SS 396
USS Runner SS 275
USS Runner SS 476
USS S-1 SS 105
USS S-20 SS 125
USS S-46 SS 157
USS Sailfish SS 192
USS Salmon SS 182
USS Sand Lance SS 381
USS Sargo SS 188
USS Saury SS 189
USS Sawfish SS 276
USS Scabbardfish SS 397
USS Scamp SS 277
USS Scorpion SS 278
USS Sculpin SS 191
USS Sea Cat SS 399
USS Sea Devil SS 400
USS Sea Dog SS 401
USS Seadragon SS 194
USS Sea Fox SS 402
USS Seahorse SS 304
USS Sealion SS 195
USS Seal SS 183
USS Sea Owl SS 405
USS Sea Poacher SS 406
USS Searaven SS 196
USS Sea Robin SS 407
USS Seawolf SS 197
USS Segundo SS 398
USS Sennet SS 408
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