Cristo tying tag line

Cristo Ramirez tying up a tag line after recovery of the OBS. The tag lines are used to hold the OBS in place and prevent swinging against the ship’s hull or other equipment while being hoisted on board. In addition to learning about seismometer instrumentation, students are also exposed to skills of traditional mariners while on marine research cruises such as tying knots, celestial constellations, navigation, and deck operations.