- Underwater imaging systems--Congresses (4)
- Remote submersibles--Congresses (2)
- Underwater acoustics--Congresses (2)
- Underwater imaging systems--Military aspects--Congresses (2)
- Mines (Military explosives)--Detection--Congresses (1)
- Optical radar--Congresses (1)
- Remote sensing--Congresses (1)
- Underwater photography--Congresses (1)
- Water--Optical properties--Congresses (1)