1962 – RV "Spenser F. Baird" –– The "Proa Expedition, Leg 2", returned Fisher to the Challenger Deep on 12–13 April 1962 aboard the Scripps research vessel "Spencer F. Baird" (formerly the steel-hulled US Army large tug "LT-581") and employed a Precision Depth Recorder (PDR) to verify the extreme depths previously reported. They recorded a maximum depth of (location not available). Additionally, at location "H-4" in the Challenger Deep, the expedition cast three taut-wire soundings: on 12 April, the first cast was to 5078 fathoms (corrected for wire angle) at in the central basin. (Up until 1965, US research vessels recorded soundings in fathoms.) The second cast, also on 12 April, was to 5000+ fathoms at in the central basin. On 13 April, the final cast recorded 5297 fathoms (corrected for wire angle) at (the western basin). They were chased off by a hurricane after only two days on-site. Once again, Fisher entirely missed the eastern basin of the Challenger Deep, which later proved to contain the deepest depths.