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Here at LSOZI, we take off every Wednesday for a look at the old steam/diesel navies of the 1833-1954 period and will profile a different ship each week. These ships have a life, a tale all their own, which sometimes takes them to the strangest places. – Christopher Eger

Warship Wednesday, July 26, 2022: 146 Miles SSW of Biloxi

Above we see 28-year-old Oberleutnant zur See (=Lieutenant) Hans-Günther Kuhlmann on the running bridge of DKM U-166, a brand new German Type IXC U-boat, circa 1942. The good Oblt. Kuhlmann was U-166‘s sole skipper during WWII and he, his submarine, and all 51 of her hands, have been sleeping along the bottom of the Gulf of Mexico for 80 years as of this week, although how they got there was the subject of contention.

One of the 54 Type IXCs completed during the war, U-166 was laid down at Seebeckwerft A.G. (Yard # 705) in Bremerhaven at the mouth of the Weser River on 6 December 1940 just after the Battle of Britain served up the first German defeat. At some 1,232 tons, she was not a big boat, running just 251 feet overall. However, the class was well designed and capable of 13,450-nm cruises on their economical diesel engines. Able to carry 22 torpedoes and a 4.1-inch deck gun with 180~ shells as well as a Flak armament, they were deadly and efficient killers when it came to stalking Allied merchantmen. While most of these boats could carry as many as 66 mines, all could also carry TMC-type torpedo mines in the place of a fish.

Commissioned on 23 March 1942, she spent the next two months in the 4. Flottille training squadron out of Stettin on the Baltic, then chopped on 1 June to Korvkpt. Günther Kuhnke’s 10. Frontflottille at Lorient in occupied France.

An AGFA video exists of her sea trials.

Arriving on 10 June after a combat sortie from Kristiansand in occupied Norway, her first war patrol was uneventful.

Spending a week in France stocking up and enjoying the local sights, U-166 sailed for her second (and final) war patrol on 17 June 1942.

Making for the Gulf of Mexico via the Florida Straits, U-166 drew her first blood when on 11 July 1942 she shelled and sank the unescorted and unarmed Dominican two-masted schooner Carmen (84 tons), which had been carrying a mixed cargo of maize, mahogany, and cedar, about 8 miles northeast of Gaspar Hernández, DR. The Dominicans had declared war on Germany four days after Pearl Harbor, for reference, and Carmen was one of four Dominican-manned ships sent to the bottom by U-boats during the conflict. While the country never sent troops overseas to help the Allies, at least 100 Dominicans signed up with the U.S. military during the war.

Two days later, U-166 fired her first warshot torpedo, ending the career of the unescorted and unarmed Ford Motor Company’s SS Oneida (2,309 tons), sailing empty from Puerto Rico to Cuba, while steaming about two miles north of Cape Maysi, Cuba. The steamer sank in minutes, but 23 survivors were able to make it safely to shore.

On 16 July, U-166 would claim her third vessel in a week, stopping the Miami Fish & Ice Co’s unarmed trawler Gertrude (16 tons) about 30 miles northeast of Havana, a port to which she was carrying a load of fresh onions. Putting her three-man crew into their motor launch and pointing them towards the shore, Gertrude was sent to the bottom with a scuttling charge or gunfire (reports vary).

Moving into the Gulf of Mexico, U-166 quietly laid nine TMC mines off Port Eads/South Pass, at the southern tip of the Mississippi River on the Louisiana coast. This was considered the boat’s primary mission, as each of these massive 2,400-pound mines could break the back of a merchantman and potentially block the Mississippi– not to mention cause a massive panic as, in typical U.S. Navy fashion, there was nowhere near enough mine countermeasures assets available to safeguard the domestic sea frontier. However, although Kuhlmann’s special mission was successful on its face, in a stroke of luck for mariners in the area, none of the mines ended up making contact and the field was cleared post-War after Allied panels were given access to Kriegsmarine records logging some 43,636 mines sown worldwide in at least 1,360 minefields.

Anyway, after delivering his eggs to the mouth of the Mighty Miss, Kuhlmann & Co. decided to stick around and pursue targets of opportunity for his remaining torpedoes. This brings us to the…

Robert E. Lee

Constructed for “Ice King” banking and shipping magnate Charles Wyman Morse for his Eastern Steamship Lines, the sistership 5,100-ton passenger liners SS George Washington and SS Robert E. Lee were put into service with Eastern’s Old Dominion Line. In 1937-38, they were making four regular sailings weekly between NYC’s Pier 25 to Norfolk’s Pier S at a cost of $12 one way or $16.50 round trip.

Just weeks after Pearl Harbor, Lee and Washington were taken up by the War Shipping Administration under contract by the Alcoa Steamship Co. and converted to carry up to 778 troops, typically on shuttle runs from U.S. East Coast ports to assorted Allied Caribbean bases and Bermuda. This conversion included a dark paint scheme, degaussing equipment to help avid mines and magnetic exploders on torpedoes, lots of Carley floats rigged to break loose topside if needed, and a single 3″/50 DP mount with its accompanying Naval Guard crew.

Sailing from Trinidad on 21 July for Tampa with eight officers, 122 crewmen, six armed guards, and 268 passengers– including 115 waterlogged mariners of the sunk tankers Andrea Brovig (Sunk by U-128 on 23 June), Høegh Giant ( U-126 on 3 June), and Stanvac Palembang (U-203 on 11 July)– along with 47 tons of general cargo and personal effects, Lee was part of Intracoastal Convoy TAW-7. However, just short of Florida, TAW-7 was dispersed, and she was carved out and diverted, escorted by the brand-new (commissioned 15 June) PC-461-class submarine chaser USS PC-566 riding shotgun, for New Orleans.

It was on the late hours of 30 July, about 45 miles southeast of the entrance to the Mississippi River and 146 miles south-by-southwest of the Biloxi lighthouse, that U-166 would see its biggest prize.

Firing a single torpedo, Lee was as unlucky as the men of the three tankers that she carried, and the ship soon sank, taking 25 souls with her.

As detailed by Uboat.net:

Lookouts had spotted the torpedo wake about 200 yards away before it struck just aft of the engine room. The explosion destroyed the #3 hold, vented through the B and C decks, and wrecked the engines, the radio compartment, and the steering gear.

…

The badly damaged Robert E. Lee first listed to port then to starboard and finally sank by the stern about 15 minutes after the torpedo hit. One officer, nine crewmen, and 15 passengers were lost. The survivors…abandoned the ship in six lifeboats, eight rafts, and five floats and were soon picked up by USS PC-566, USS SC-519, and the tug Underwriter and landed in Venice, Louisiana.

The end of U-166

Immediately after Lee was hit, her escorting 173-foot subchaser PC-566, with her green crew under the command of LT Herbert Gordon Claudius, USNR, dropped five depth charges across a sonar contact, circled back and dropped another five, then proceeded to pick up survivors after the contact disappeared in deep water and a large– reportedly 200 feet wide– oil slick was observed.

PC-566‘s depth charge runs were considered (at the time) ineffective, but U-166 never made it back to Lorient.

As Claudius and his crew had been rushed into service and had not received any formal ASW training yet, his reported “kill” was dismissed as unlikely. The new skipper was stripped of his command, sent to Sonar school to ride a desk, and admonished “for breaking radio silence twice prior to his arrival” and for “not being in the proper patrol station, nor that any proven system of attack was followed.” Further, the Navy said, “it is not considered probable that any except minor damage could have been sustained by the submarine.”

Post-war U.S. Navy analysis of German records chalked up the killer of Oblt. Kuhlmann’s boat as a Coast Guard Grumman J4F-1 Widgeon seaplane (the same type of plane from “Tales of the Golden Monkey”), #V212, from Coast Guard Air Station Biloxi.

Piloted by Chief Aviation Pilot Henry C. White with RM1 George H. Boggs as a crewmember, V212 was forward deployed from an outlying grass field at Houma, Louisiana owned by Texaco, and reported depth charging a surfaced German U-boat on 1 August, two days after Robert E. Lee was lost and about 100 miles away from that killing field.

As detailed by CG Aviation History:

They were at 1,500 feet at the base of a broken cloud deck 100 miles south of the Houma base. Through the open windows of their twin-engine Grumman J4F-1 Widgeon amphibian, they could see about 10 miles across the hazy gulf sea. White had just turned to the northeast to set up a ladder search for the assigned area and moments later they saw a surfaced German submarine. White started to maneuver the Widgeon behind the sub for a stern attack, but it immediately became obvious that as soon as White and Boggs had seen the sub, the sub had seen them, and the U-boat began to slide underwater in a crash dive. White banked sharply to starboard and from a half mile away began his dive towards the sub fully aware that he had only a sole depth charge under his wing and that he would have but one try.

At an altitude of 250 feet, the single depth charge was released. Boggs stuck his head out of the window and watched the depth charge fall into the Gulf waters, its fuse set to explode 25 feet below the surface. He estimated it entered the water 20 feet from the submarine on the starboard side. Boggs saw a large geyser of water rise from the explosion. White later wrote that the submarine was visible during the entire approach being just under the water and still clearly visible when the depth charge was released. When they circled back around, they saw only a medium oil slick. German records obtained after the war verified that the U-166 had been sunk in that area at the beginning of August. White and Boggs were given credit for the sinking.

Coast Guard Air Station Biloxi was an 18-acre seaplane base founded at Point Cadet on Back Bay in 1934 and remained in service until 1966 when the land and its 12,000 square-foot hangar and barracks were turned over to the city.

The destruction of U-166 by V212 went down in Coast Guard (and Grumman) history and was celebrated for the rest of the 20th Century. This led V212– which had been sold on the commercial market in 1948 when the USCG got out of the Widgeon game and later flown as a commercial airliner (N212ST) in Alaska– to be acquired by the National Naval Aviation Museum at NAS Pensacola in 1988 and preserved, reverted to her WWII USCG livery.

In all, from 1942 into 1943, no less than 24 German U-boats patrolled the Gulf of Mexico– the American Sea– sinking 56 Allied vessels of which 39 are in the coastal waters of Florida, Louisiana, and Texas. U-166 has the distinction of being the only German submarine lost in the Gulf.

Epilogue

In 1986, Shell Offshore found two likely shipwrecks on a deep tow survey in one of their leased oil fields due south of the Mississippi Gulf Coast in 5,000 feet of water. It was thought that one was possibly the remains of the bauxite freighter SS Alcoa Puritan, another World War II casualty lost in the same rough area as Robert E. Lee, sunk by U-507 about 15 miles off the entrance to the Mississippi River in May 1942.

In 2001, deep water HUGIN 3000 AUVs of C&C Technologies working pipeline survey along the bottom of the Gulf of Mexico’s Mississippi Canyon for BP and Shell (the Mississippi Canyon is home to well MC 252, the infamous Deepwater Horizon well), found a single-stack ocean liner and, less than a mile away, a broken submarine.

This was the first time U-166 was reported found.

In 2003, a more extensive search in conjunction with NOAA extensively documented the sites.

In 2010, U-166 was briefly revisited during the Lophelia II study, where archaeologists collected additional ROV videos, still photos, core samples, and biological samples and re-examined the test platforms that had been deployed on site since 2003.

Finally, in 2014, as part of a National Geographic Explorer-funded effort that was turned into a one-hour special, Robert G. Ballard surveyed the U-boat and suggested that one of PC-566’s depth charges had wrecked the bow and likely detonated several torpedo warheads.

Further analysis by the Naval History and Heritage Command agreed. It turned out PC-566 was the only one of the 343 PC-461 class submarine chasers to be credited with sinking a U-boat.

The Navy (posthumously) awarded Capt. Claudius, USNR (ret), the Legion of Merit Medal with a combat “V” for sinking U-166.

This also brought some closure to Kuhlmann’s widow. Following the film crew documenting the discovery of the U-boat, she donated an ample collection of images from Kuhlmann’s service to The National WWII Museum in New Orleans through the PAST Foundation, where it is preserved as part of the story.

Down the coast in Biloxi, U-166 has always had a special place in the city’s lore, as for years it was celebrated as the base where V212, the long-thought dispatcher of the boat, was assigned. The City’s Maritime & Seafood Industry Museum— located on the grounds of the old Coast Guard Air Station at Point Cadet– has exhibits on the base, its aircraft, and history, as well as the barrack’s tower, saved after Hurricane Katrina.

Since 2005, the Seafood Industry Museum has been in the possession of a 45-foot U-boat model, constructed for the film U-571, that has been dedicated to U-166 (although it depicts a German Type VII U-boat) after a rework in 2008 from volunteers of the Tullibee Base Submarine Veterans and those of Seabee Base Gulfport.

As for V212, the NHHC revised the record book and cited that the Coast Guard seaplane likely had attacked but failed to sink U-171, a Type IXC sistership of U-166 that was operating in the same area at the time and reported being bombed by a “Flugboot” (flying boat) on 1 August with slight damage. U-171 went on to sink the tanker R. M. Parker Jr. (6,779 tons) two weeks later off the Louisiana coast, then was herself lost just short of Lorient when she struck a mine just miles short of the end of her maiden war patrol.

Speaking of losses, of U-166’s sister boats, 50 of 54 were lost, almost all to Allied ASW efforts. Only four survived the war and a single example, U-505, is the only one of two of her class (U-534 was sunk in 1945 and then salvaged by the British in 1993) preserved. Of all places, U-505 is in Chicago.

And finally, Robert E. Lee’s sister, George Washington, survived the war and lived a second life in the Pacific until the mid-1950s.

Specs:

Displacement:
1,144 t (1,126 long tons) surfaced
1,257 t (1,237 long tons) submerged
Length:
251 ft 10 in o/a
192 ft 9 in. pressure hull
Beam:
22 ft 6 in o/a
14 ft 7 in pressure hull
Height: 31 ft 6 in
Draught: 15 ft 4 in
Installed power:
4,400 PS (3,200 kW; 4,300 bhp) (diesels)
1,000 PS (740 kW; 990 shp) (electric)
Propulsion:
2 shafts
2 × diesel engines
2 × electric motors
Range:
13,850 nmi at 10 knots surfaced
63 nmi at 4 knots submerged
Test depth: 230 m (750 ft)
Complement: 4 officers, 44 enlisted
Armament:
6 × torpedo tubes (4 bow, 2 stern)
22 × 53.3 cm (21 in) torpedoes
1 × 10.5 cm (4.1 in) SK C/32 deck gun (180 rounds)
1 × 3.7 cm (1.5 in) SK C/30 AA gun
1 × twin 2 cm FlaK 30 AA guns

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