Note-1:
Because of where YUGUMO placed in the formation the night when sunk at Vella Lavella it would seem unlikely she had radar --- or does it? Also, there is possibilty that the remarks refers to radar detectors. Complicating the picture is a `photo-sketch' that appeared in Ships of the World June 2004 that purports to show YUGUMO's bridge. The image looks like other examples of sketches rendered directly from a photograph by contributors to the magazine and somewhat suggests YUGUMO had received the late 1943 look with new foremast modified to carry Type 22 radar as well as the forward twin 25 mm bandstand in front of the bridge. If this is true, it explains the mentions of radar. The pertinent page 171 from the June 2004 issue of Ships of the World is put Here in case our readers can expand on its provenance. If so, please contact me.
Note-2:
Such the Chief Engineer Ishii Soroku reported. It is difficult to see what the agent may have been. CHEVALIER and O'BANNON do not seem to have been in any condition or close enough to do so and it is known SELFRIDGE hurried on ahead and was engaging Desdiv 27 at the time. The U.S. destroyers can almost certainly be ruled out. It is unknown to the editor if a PT boat was present at this time but could account for such an incident if true. The Chief Engineer's account also makes clear that the flooding of YUGUMO's engine room (there was no centerline bulkhead) is both what doomed the vessel but kept it relatively upright. It is not unlikely Cdr. Osako and others were already dead on the demolished bridge by that time.
Note-3:
The sinking of the YUGUMO saw one of the more notorious and tragic incidents involving attempted rescue of Japanese to take prisoner. A sailor of PT-163 was killed by a PoW doing an `escape-by-suicide.'When others jumped up, eight more were reflexively and understandably gunned down. The PoWs that didn't move remained unharmed.