Trim Stab
No, actually there are not.
There is currently
nothing else that does what the freak show does as well as it does, and certainly was nothing else in Telic that was "cheaper, faster quieter"
That is why the US has been very keen to buy the system on board and stick it in a V22.
Or if you know something different tell us all....?
PN
No , not really except in the loosest sense. Even the Mk2 was different enough. The Mk7 bears very little similarity.
Then again, you are on the same wavelength as the telegraph
"designed to hunt submarines"