Talk:Vortex Torpedo/@comment-87.179.95.221-20160827155859/@comment-444327-20160927012926

Modules come in two forms; passive and active.

Passive are always in effect (Pressure compensator, Power efficiency, Solar charger etc.) and are green on the hotbar when in the Seamoth. Active are usable with left click and have to be active to use them (Sonar, Perimeter Defense System etc). You have to manually switch them on with 1, 2, 3 or 4 depending on where it is on the hotbar. They're grey when inactive and blue when active.

I've not used them myself, but I would imagine the Torpedo attachments are Active modules and have to be both installed onto the Seamoth and active to function.