1. When deployed they work for a limited time no more than 10 minutes.....
2. Try to deploy them just above the the depth were you here the Thermal layer announcement. Deploy your decoy above the layer then slip below it and change your heading 45 degree's or more. The destroyers will home onto the decoy and you will slip silently away running no faster than slow...
3. A decoy deployed at a torpedo launc point will interest the DD's immensly and they will converge for a look/see and an atack run or two..
4. It's a finit resource so deploy them wisely..
5. Finally remember no to drop decoys in a line indicating your heading, like breadcrumbs they will follow and ten your goose is cooked.
6. You can deploy decoys in a descending mode till you reach the thermal layer depth then a full right or left rudder to get a bearing offset...
7. Remember that the DD's will congregate around the decoy's... A great way to set up a turkey shot if the DD's are annoying enough....
Next time your in port obtain a expendable companion sub. Do this buy getting a 1500' lenth of 3/4inch line. Entering into a battle scenario have the spool of line depoyed to the rear of your cigarette deck. To the bitter end of the line attach an orange crate filled with a nmber of various size empty tin cans. deploy the orange crate over the side and spool out the line to it's max length. The line will tow aft and follow your lead in turns just to the outside of your turns.
Rig a loop around the observation scopes shear and tie off the line taut. Raising the O scope five feet will cut the line and it will slip off leaving your "towed companion" aft and at distance.
Now you can use this companion to lure in a DD into an attack run. It's noisy as hell so youve got bait to pull em into a firing solution of your own making...
Deep six em!!!