Matthew Feeley  Master’s Student Department of Ocean and Resources Engineering University of Hawai’i at Mānoa **This defense will be held in-person only  at Holmes 287 Oceanographic research conducted by unmanned robotic swarms demands spatially precise coordination of vessels. Although research in position control of autonomous vessels has advanced, it is challenging to acquire relative positioning guidance at sea without committing significant resources toward vessel modifications or new equipment. This paper presents an overview of NarwhalNav, a navigation technology designed to make relative positioning data more accessible. NarwhalNav integrates a GNSS receiver, radio and software into a mobile package for rapid