A great variety of tools are available to scientists during MBARI ocean research expeditions. Some technology is transferred from our many research collaborators, but the majority of our tools have been custom-designed and developed by engineers, scientists, and machine operations staff in-house. This is never a trivial task. All seagoing equipment must be specified to work in saltwater, in remote locations, and at extreme temperatures and depths. Equipment is thoroughly tested using a test tank located in our shore side facilities before being deployed at-sea.