[oceanview]

but what did those divers do?

[Domestic Church]

I think the divers secured a device somehow...and the task necessitated at least two...one with diving experience hired to make sure the other neophyte was properly geared up and could complete the task. The hired one then probably was kabonged somehow and had his hose cut or something similar and tanks and belt detached. Then the neophytes could go onto their next target.