- Stealth Infiltration: Runs dark except for a dim interior lamp—ideal for late-night ambushes
- Observation: Three reinforced viewing ports for handheld binoculars or periscope insert
- Attack Pattern:
- Detect target vessel by periscope-style window scans
- Slip below snorkel depth and remain undetected until the last moment
- Surface suddenly alongside enemy craft and board with shock team
