I had to change depth quickly, because the DC´s where damn close at 150 depth, and i noticed that at shallow depth with a lot of ships around you, they have problems locating you. It´s really easier to get away at PD with freighters around you then at deep depth with pings all around you. It was night, so my sparges was hard to spot, and this saved my ass I think... Nevertheless I won´t try this again