Harbor recon tactics

[Ca[t White]

I'm currently doing a photo recon mission of Tokyo Harbor and I would like some advice as to how to do this type of mission. Im running my sub on silent running however, I can't seem to avoid the destroyers and sub chasers. I have read the sh4 guide on how to do a photo recon mission however, I'd like some advice from anyone who has done a mission like this already. Another factor that works against me is diving and surfacing i dont have a lot of room to work with because of the shallow area.

Any advice would be greatly appreciated. Thanks