North Carolina 1984 July 261. Umbilical diving through the ice provides a safety line back to the hole. J. Peress' 1-atm dive suit, Tritonia, explored the Lusitania wreck in 1912. Pre-dive check list ensures safety of bell dive operations. North Carolina 265.
Some manipulator arms have tactile feedback and can handle delicate items.
NURP's Hawaii center operates an RCV-150 as a safety system for its sub. Manipulator arms with tactile feedback are especially useful for science. MiniROVer's fresnel lens used for counting particles and plankton. California, Moss Landing 275. Conning station includes joysticks to operate ROVs and cameras.