Turn 21: Aggressivenes cost

16 - 22 September 1932

8 boats on patrol
4 boats in transit
11 boats returning to base
6 boats in bases
2 boats in repair

   Another black week with two submarines lost. This week losses rised Our total to 6 submarines buried underwater. Lack of submarine fleet effectiveness and high losses, really put My actions in doubt.
   S-27 earlier discovered by enemy, was attacked on surface and sunk on way home from South China Sea patrol.
   Narwhal was badly depth charged, after attacking huge task force. After sinking Jintsu, a 5000 tons light cruiser, escort tracked and deadly damaged Narwhal. Emergency surfaced, abandoned and destroyed by enemy gunfire. She sunk first warship in campaign.
   Meantime her sister ship, Nautilus sunk another huge 16000 tons fleet oiler Erimo. Also S-47 scored medium 3000 tons maru.
 
This week total: 3 ships sunk, 24000 tons

Turn 20: Big hit

8 - 15 September 1932

8 boats on patrol
4 boats in transit
11 boats returning to base
6 boats in bases
2 boats in repair

   Crew of Bass submarine, rapported stunning success this week. Boat durning her patrol in Carolines area, spotted small fast group. This important task force, included heavy and two light cruisers, was attacked at dusk. Aiming in the biggest ship in middle column, Bass fired full salvo. Explosions ablaze the night sky, when target was hitted. Slowly sinking ship silhouette was recognized in fire light, from burning on water surface oil, as 16000 tons fleet oil tanker Notoro. This attack is a biggest success of entire Pacific Submarine Fleet, hitting directly into Imperial Japanese Navy.

This week total: 1 ship sunk, 16000 tons

Turn 19: Stagnation

1 - 7 September 1932

12 boats on patrol
5 boats in transit
8 boats returning to base
3 boats in bases
3 boats in repair

   This week bring no any hits. All of 12 boats on patrol missed or was unable to attack. Dolphin is a last boat arrived to Pearl Harbour, to reinforce Pacific Submarine Fleet.

This week total: no ships sunk

Turn 18: No success - big hope

24 - 31 August 1932

13 boats on patrol
5 boats in transit
8 boats returning to base
2 boats in bases
2 boats in repair

   This week bring no successes yet, but many boats encountered many capital ships and large auxiliaries. New aggressive tactic have also a second side, vunerable submarines exposed to escort threat are forced to abort patrol damaged. In addition, slow Japanese advance on Luzon toward Manila, affected the base safety. Damaged boats are diverted to Pearl Harbour, to avoid being sized by enemy in docks, which created extra weeks in route to and from base.
   S-35 avoided the escort entered the convoy and attacked aircraft carrier Hosho. Hosho in last moment spotted the marks on water and evaded from accurate shotted salvo.
   Meantime during searching for fat targets, Leviathan and S-31 sunk 3000 tons merchant each.

This week total: 2 ships sunk, 6000 tons

Turn 17: New tactic implemented

16 - 23 August 1932

7 boats on patrol
12 boats in transit
4 boats returning to base
4 boats in bases
3 boats in repair

   With new plan, all submarines are forced to more aggressive attacks. Instead of firing torpedos from safe distance, boats needed to close distance to convoy and attack big ships hiding in the middle. This task also expose submarine to escort detection and counterattack, and give boats only short moment for attack. Another problem is a lack of underwater maneuverability, which force the skippers to plan forward the attack, took the position in front of convoy just for one chance shoot into fat target.
   As expected, this week most boats was unable to overtake the fast convoys, having no chance for attack. Only Narwhal was close to sunk big 9000 tons auxiliary ship, but this chance was wasted after hitting her with dud torpedo.

This week total: no ships sunk

Turn 16: Commerce riding failure

9 - 15 August 1932

7 boats on patrol
5 boats in transit
3 boats returning to base
12 boats in bases
3 boats in repair

   This week score, single 5000 tons sunk by S-44, left Me with no more hope into commerce riding tactic. Submarine fleet total is 66000 tons sunk in 16 weeks time,  in almost half of the campaign time. If I keep this sunk level in to the end of the year, I should finish with about 130000 tons, which is catastrophic defeat. To reach more then 200000 tons, I need sunk twice so many ships, which is impposible in My opinion. In conclusion our submarines are technologically unprepared to real combat, even to commerce riding, and required futher development. They are too slow (on surface and submarged), with too short range, too vulnerable in combat and lack of  torpedos. In addition torpedo problem rised our bar even higher, quickly depleted of  missed torpedos ship, need to aboart patrol too quickly gaining nothing.
   Unable to seriously reduce enemy merchant fleet, and with this war materials and natural resources import to Japan, I only see the way to victory in eliminating Japanese Navy units. Damaging or eliminating big naval units can be vital point to gaining advantage in Decisive Battle of the Pacific. With new orders, S-1 class  submarines starting to concentrate on very large enemy ships, like tankers or auxiliary units. For the rest of the boats, new task is to attack important capital ships, including aircraft carriers and battleships. This new tactic will last for August and September, then I reconsider the outcomes.

This week total: 1 ship sunk, 5000 tons

Turn 15: Nautilus to help

1 - 8 August 1932

4 boats on patrol
6 boats in transit
9 boats returning to base
6 boats in bases
5 boats in repair

   With many submarines returning or in bases, this week only seen four boats on patrol. Barracuda was spotted on approach to convoy and kept underwater for hours. Meantime other three boats made bunch of fruitless attacks, scoring no hits.
   This week our Pacific Submarine Fleet recieved new Nautilus another of Narwhal class boat.
   S-32 left the repair dock after month. She is a only boat which sunk three ships on one patrol.

This week total: no ships sunk