ChezDaJez
Posts: 3436
Joined: 11/12/2004 From: Chehalis, WA Status: offline
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quote:
I forgot to ask Chez this turn what his mortality rate has been on submarine attacks, but as I noted in a previous post it must be running on the order of 70% if not higher still. And again, the majority of these kills by the USN have been when his I-boats (mostly) have attacked my supply convoys, which are, to repeat myself, escorted by just three or four destroyers as a rule. In all of these attacks on my supply convoys he has managed to sink just one AP. Mortality Rate? Let's put it this way.... at the current loss rate, I will have no subs left by Feb 43. Both sub doctrines are on. I have lost 23 subs with another 3 currently heavily damaged (1 still at sea trying to make port with 67 flot damage). 2 others were also heavily damaged but have since been repaired. 18 of the subs were sunk in deep water, most by convoy or surface escorts. 2 were sunk while laying mines in an enemy port. 1 was sunk by acft. Losses break down as follows: 1 sunk by 500lb GP bomb (US) 14 sunk by Mk 7 DC (US) 8 suunk by MK VII DC (US) ASW Attacks through 6/20/1942 Allied ASW Results: 71 attacks, 23 sunk, 5 damaged Hit Percentage: 39.4% Sunk Percentage: 32.3% Damage Percentage: 7.0% IJN ASW Results: 54 attacks, 4 sunk, 3(?) damaged Hit Percentage: 12.9% Sunk Percentage: 7.4% Damage Percentage: 5.5% All Allied subs sunk by Type 95 DC Japanese subs have sunk 2 DDs, 4 AKs, 1 AP and 1 PG. US subs have not sunk any ships of any type. Basically, 2 out of 5 Allied ASW attacks in the game result in a sinking. This is way out of proportion even for the Atlantic in 1945 IRL where the sink rate was less than 20% per attack. The real life Japanese loss rate was 1.41:1 subs per month in 1942. In our game, it is 3.28:1 per month As an aside, I am currently reading Clay Blair's "Silent Victory" about the US submarine war in the Pacific and from what I've read so far, the majority of Japanese merchants and tankers overe 1000 tons in 1942 were escorted by at least 1 destroyer. Every single submarine skipper stated that the Japanese ASW was very good and nearly every sub attack resulted in a depthcharging, sometimes very severe. The US lost 3 boats to enemy ASW. Substantially more boats would have been lost if the Japanese had set their depth charges deeper than 150 feet. US subs sank only 2 major combatants during 1942, the CA Kako and the CL Tenryu. They conducted 23 attacks on battleships and carriers resulting in 1 torpedo hit on a BB for slight damage. Most of these attacks came as a result of Ultra intercepts. Japanese merchants losses were 180 ships for 725,000 tons. The Japanese actually ended the year with more tonnage than they began. US subs fired 10.8 torpedoes for every ship sunk. In contrast, Japanese subs in 1942 sank the CVs Yorktown (previously damaged at Midway) and Wasp. The also sank the CL Juneau and torpedoed the Saratoga on 2 separate occasions and heavily damaged BB North Carolina and the CA Chester. The Japanese lost 23 submarines in all of 1942, 6 of them to US subs. I have lost 23 in just 7 months and this is without aggressive play. I have tried to use IJN subs as they were IRL, that is primarily scouting. Chez
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Ret Navy AWCS (1972-1998) VP-5, Jacksonville, Fl 1973-78 ASW Ops Center, Rota, Spain 1978-81 VP-40, Mt View, Ca 1981-87 Patrol Wing 10, Mt View, CA 1987-90 ASW Ops Center, Adak, Ak 1990-92 NRD Seattle 1992-96 VP-46, Whidbey Isl, Wa 1996-98
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