To stay out of the minefields at Darwin lol
I added defensive minefields and nets to lot of key allied harbors, scripted the waypoints for traffic so they travel through the gaps. I stopped for fuel en route, entering Darwin on surface carefully to stay out of the mines was interesting as was first time have done it since adding the US minefields to TMO. to patrol Celebes Sea in August 1944.Apparently I missed these guys in the harbor traffic somehow (have to go find and correct) as when I arrived the one DD was burning most of ship submerged in shallow waters, stern sticking in the air. As I was leaving, another DD moving about stumbled into the field and BOOM. Quite an explosion and secondary explosions a swell. Burned bow to stern then sank fairly quick. I made the mines more powerful as thought it was silly a player sub could hit one and survive. Watched a BB hit one in testing, damaged it but did not sink so not overpowered for capital ships.
Aussie DD exploding after striking mine while was leaving after topping off fuel.
When mines are set to depth of zero, they are visible "surfaced" in the sim.