How to fire individual missiles from multiple loaded tubes?

[Phoenix05 (OP)]

I have a sensor bouy ship however the bouys are kind of expensive and i dont want to launch an entire volley but i would rather launch a single one. 

EDIT:https: //cdn. discordapp. com/attachments/318915956573470720/353761799373586443/unknown. png i get this error when  trying to use the msl launch button it has been sitting around for ages

[Barkhorn]

Link the fire controls to the launchers one at a time.  Only launchers linked to FC's can be fired.

Transit effects last hours iirc if you used a standard transit, not a squadron transit.

[serger]

Concerning bouys - transit effect didn't prevent launches at the waypoints, though you cannot use FC to lock "real" targets.
I used it many times to jump in, drop salvo of missile mines immedietely and jump out the next 5-sec increment (with jump tenders, that didn't jump at all, of course).