Like Gargamel said, the flank is what's giving you away, also in an area such as Scapa, with its shallow waters, it doesn't take much tuning for the ASDIC to find you. Set for silent running and keep adjusting your course, I find using the rudder controls rather than the compass makes this easier. As when you give a course change using the compass, you will always go hard to starboard or port, but if you set it for a 9 degree turn to port you will be able to maintain 2/3kts easily rather than the 1kt when your rudder is hard to port/starboard.
You can use the shallow waters to good effect though, especially in Scapa, I have found out to my great pleasure, that when leaving, hug the coastline as close as you dare. The DD's will be so engrossed in destroying you that they don't notice the beach rapidly approaching
"Hard to port!"
"Sir we can't, the water has turned to some form of grainy brown stuff"
"Drop a charge!"
*Boooooooooooooooooooooooooooooooooooom!"
I don't know if anyone uses this technique, but I set my eels for the fastest time to target over distance. i.e distance <5000m fast. 5000 - 8000 Medium and 8000 - 12000 Slow. This works a treat when the weather is perfectly clear and you are 10km away from a port, as you can fire the eels off and be away at slow speed before anyone even notices you are there. The only downside to this is the poorer the weather the closer you need to get, but of course these are the moments we live for.
Distance to target 450m, estimated tonnage 11000GRT, eels left: 2, arsehole twitching like a rabbits nose.... FIRE!
Oh yes!
