I have been chronicling the actions of the US Forces in the Pacific fleet for a number of months and in doing so have found some really great stories with a lot of detail about how the war was progressing in mid 1945. One of those stories started with a small footnote about a wolf pack operation in the Java Sea conducted by the submarines USS Blueback (SS-326) (Balao-class submarine – commissioned 1944) and USS Lamprey (SS-372) (Balao-class submarine – commissioned 1944) as they battled the Japanese submarine chaser Ch.1 in a surface gunnery action off Japara, N.E.I., 06°28’S, 110°37’E.
What I like most about these stories is the human face they put on the war’s prosecution. The Blueback’s war patrol records and deck logs have been preserved and I was able to trace the action in the words and sometimes very interesting thoughts of her skipper M.K. Clementson Cdr. USN. one small example came in his final report where he spoke about crewmembers who were departing before the mission began. While reading the original report, I was a bit confused for a few moments about the upcoming re-assignment of Lt. James Mercer who had completed 13 war patrols.
By this time in the war, many of the submarine skippers were modifying their deck guns to suit the missions they would be conducting. During his refit in Perth AU prior to commencing the third war patrol, Clementson and his crew rearranged the location and firing support devices for much of his topside weaponry. The hope was that with an increased capacity to conduct surface operations, they would be able to have more flexibility in attacking the dwindling enemy surface fleet and merchant fleet. During the third war patrol, Blueback would get credit for sinking one patrol boat using surface tactics.
Night Action – Java Sea
This story occurs on May 28th in the Java Sea. While the world and most of the military was still focused on the continuing battle of Okinawa, patrols by the US Submarine force continued all across the pacific. The boats that had been rushed into service during the previous few years had finally started overcoming the torpedo problems of the early years. Success after success had started piling up and even though submarine losses also took their toll, new fleet boats were adding to the overall efforts in ways never before imagined. At 0355 on the morning of the 28th, Blueback had just completed a secret mission and was beginning her patrol. She sighted what she thought was a Jap destroyer at 0510 and sent a report to the Wolf Pack she was operating with.
From that moment on, she would join with the Lamprey in a running torpedo and gun battle in the Java Sea.
The Balao submarine classs was made up of 120 boats and those were typically armed with the following weapons:
10 × 21-inch (533 mm) torpedo tubes
(six forward, four aft)
1 × 5-inch (127 mm) / 25 caliber deck gun (which replaced the 4-inch 102mm gun installed at the beginning of their service)
Bofors 40 mm and Oerlikon 20 mm cannon
During her overhaul prior to WP 3, the guns on the Blueback were modified as follows: the twin 20 MM was moved from the cigarette deck to the main deck forward and a second 40mm was installed on the cigarette deck. They also installed specially braced mountings for twin 50 caliber machine guns and twin 30 caliber machine guns on the bridge. In short, the Blueback was loaded for bear and was ready to take on any targets she would encounter on the surface.
Wolf Pack – American Style
German submarines are well known for Wolf Pack tactics that resulted in horrific losses. Not as well known are the Wolf Packs that the US Forces operated in during the Pacific campaign. Starting with the coordinated attacks of the USS Cero, many combined operations were mounted. At first, there was a reluctance among the individual skippers to advocate for this type of operation. But some, including Captain Swede Momsen saw the need for new tactics in this war . USS Cero cleared New London 17 August 1943 for Pacific waters, and on 26 September sailed from Pearl Harbor, bound for the East China and Yellow Seas on her first war patrol. This patrol was also the first American wolfpack, comprising Cero, Shad (SS-235), and Grayback (SS-208), commanded from Cero by Captain “Swede” Momsen.
At 0843, the Blueback submerged and began a day long track and search pattern looking for the contact the had sighted at 0520 and at 1910 sighted a submarine that was identified as the USS Lamprey. At 1954, she surfaced and communicated with Lamprey using blinker lights. At that time Blueback was informed about the three targets in the Japara anchorage. Plans were then exchanged for the hunt. At 2010, there was a radar contact which the skipper verified was not a submarine. The contact was at approximately 12,000 yards and zig zagging.
From the action report:
“Can just barely get in a night tracking surface approach before the just rising full moon gets too high. Tracking 10 knots, base course 090 true. Am convinced this is our OOD. Will have enough moon before shooting to make certain it is not a submarine.”
One of the greatest fears of submarine commanders concerning the Wolf Pack approach was in not shooting a fellow American submariner in the heat of the battle. Our technology in weapons firing and ship identification was pretty basic during that war so this was a real concern.
At 2033, confident of his target, Blueback headed in at flank speed.
At 2102, Blueback slowed to 2/3 speed. He received a message from the HMS THOROUGH giving his position and stating that a patrol craft has been patrolling in the area all day. Target was not THOROUGH. Target definitely not submarine. (Note: HMS Thorough was a British T class submarine that served in the Far East for much of her wartime career, where she sank twenty seven Japanese sailing vessels, seven coasters, a small Japanese vessel, a Japanese barge, a small Japanese gunboat, a Japanese trawler, and the Malaysian sailing vessel Palange)
At 2107, with confidence that the vessel was not a submarine, Blueback fired five MK 18-2 torpedoes forward. Torpedo run was 3000 yards. At 2109, the skipper turned the boat and fired 2 MK-14-3A torpedoes aft, torpedo run 2200 yards. All missed and as a good close broadside view of the target was obtained, it was discovered that this was not a destroyer but a patrol boat. Blueback headed away at 19 knots. The patrol boat headed away from a torpedo that broached just ahead of him.
Blueback’s skipper made a note in the log:
“Made mental note to always use binocular formula hereafter in an attempt to avoid such costly errors in the future. Even with grim visions of my income tax soaring to the stratosphere. Won’t be able to look a taxpayer in the eye.”
At this point he slows the ship and manned the 5″ and two 40mm gins and informed Lamprey who was 9-10,000 yards to the northwest.
At 2135, Blueback opened fire and immediately got some hits. These hits resulted in a small fire being started on the patrol ship’s forward action station. He commenced returning fire , too accurately according to reports with 25mm explosive shells.
at 2140, Blueback laid a smoke screen and opened range. The moon was brilliant by that time and very low. Blueback was heading into the moon and was weaving to each side trying to distribute the smoke in any direction but true west. The target’s gunfire was on them every time they emerges from either side of the narrow screen.
At 2143, Lamprey opened fire with her 5′ gun but in the words of the Blueback CO “The silly target didn’t know enough to shoot at him.” Then Blueback opened range to 6500 yards and headed to join the Lamprey. The target was making radical maneuvers and returning fire on both Lamprey and Blueback by this time with four guns. The Lamprey skipper reported that “his aim was not very good”. Lamprey expended 40 rounds of 5″ ammunition and recorded two sure hits.
At 2200, Blueback fired a few more rounds of 5″ at his gun flashes but when he ceased firing, there was no more point of aim. Blueback decided to call it a draw (except that Blueback was not hit thanks to the smoke screen.) Lamprey made the same decision at 2209 and the engagement was completed. Blueback’s skipper records in his log that better night sights and star shells would have helped considerable to eliminate “this boil on the heel”.
Lessons learned from the action that night:
1. Get and keep the TARGET up moon,
2. Concentrate forces on initial attack.
At 2207, Blueback set course for new area, 3 engines… At 2339, Lamprey departed for her new patrol area in the Karimata Strait.
The CH-1 would survive the rest of the war but had one more brush with the American submarine fleet. On the 16th of July 1945: West of Surabaya, Java, she was escorting gunboat NANKAI (ex-Dutch minelayer REGULUS) when they were attacked by LCDR William H. Hazzard’s USS BLENNY (SS-324). Hazzard fires a total of 12 torpedoes in a night surface radar attack and claims four hits that sink NANKAI at 05-26S, 110-33E. At about 0700, Hazzard finds and shells CH-1 with his 5-inch deck gun. BLENNY gets two hits that set CH-1 on fire at 05-16S, 110-17E.
Despite two attacks, CH-1 survives the war and is finally scuttled by the Royal Navy in Singapore in 1946.
Both Blueback and Lamprey also survive the war. Guns would be removed from the decks of post war submarines for a host of reasons. Submarines evolved through technology to be more effective under the water during all modes of warfare and a deck gun was no longer needed or practical. One of the many enemies a submarine fought was the airplane and post war development of antisubmarine air forces increased the danger of being on the surface for any period of time. But having those guns on board WW2 boats was a critical factor during the early months and years where the unreliable torpedo corrupted the ultimate mission of a submarine. The other factor of not wasting a torpedo on smaller craft played a key role as well
Seventy years has passed since that night action on the Java Sea. The bravery of those men on both sides under some very difficult conditions is a testament to the strength found in men who are committed to a cause.
By the way, come to Pittsburgh this September 7-13 and celebrate the heroes of the US Navy submarine forces.
USSVU National Convention web site: http://www.ussviconventionsteelcity2015.org/
2 thoughts on “Gunfighters on the Java Sea – May 28 1945”
[off topic – I need to ask for a favor. On my D-Day post today, fellow blogger, Feral, asked what type of torpedo he spotted, but I was unable to answer. Is it possible for you to come and see if you can help?]
I went to the site (loved it a lot) but did not see any torpedoes??? Maybe you can point me to a better way to find it?