Timely use of sensors is also important. Acoustic sensors need to be deployed accurately. You can not normally attack a datum you need to get back into contact unless other things are driving your ROE. Dropping buoys from height adds complications: wind effects the ballistics and the time to drop/ get to the desired point in the water from height add to the pool of problems. If you wish to drive the buoy to a desired water entry point the Nav system on the buoy needs to be up and running at the point of release, therefore needs to be linked to the weapon system onboard the release platform up to the point of release. How do you drive the buoy, glide or powered, both have issues including sub counter detection of a powered buoy. Weapons will have the same issues.Release to service will also be interesting. A lot of effort for no much benefit. Unless there are other reasons why you do not want to tackle the problem be being at low level.