The research mini-submersible РС-8В has been in operation since 1987. Technical specifications:

• Operating depth – 250 м
• Deadweight – 5 t
• Length – 6.5 м
• Crew – 2+1
• Range of underwater cruise – 5 n miles
• Autonomy underwater – 5 hours
• Scientific equipment – photo-camera, video-camera, manipulator, sampling devices.