While the submersibles are at depth, the technicians in the Navigation Lab must take accurate measurements of their position. This is aided by the use of transponders that are deployed for aid in ranging. The technicians are in constant communication with the submersible.
Technician to Submersible
Image courtesy of the RMS Titanic Team Expedition 2003, ROI, IFE, NOAA-OE. Download larger image (jpg, 2.3 MB).

While the submersibles are at depth, the technicians in the Navigation Lab must take accurate measurements of their position. This is aided by the use of transponders that are deployed for aid in ranging. The technicians are in constant communication with the submersible.