Attached is the page from the VPB-111 War Diary. Note the other patrols mentioned are around Borneo also. However, In the summary paragraph at the start of the month there is this statement.
"During the month, most patrol flights in the sectors along the East and West coasts of Borneo were extended to maximum distance and served as interdiction flights for Oboe-6 and Oboe-2 operations. During this period no enemy forces were encountered although dawn to dusk was rendered,
including several special reconaissance flights into Singapore to check on Jap cruisers known to be there."
One June 1, there is a report of one of these Singapore flights where a plane flown by
Lt Comdr H. F. Mears from VPB-106 is lost at Singapore. Two planes were sent on the mission, the 2nd plane circled the crash site "until certain there were no survivors". The 2nd plane was flown by a Lt Heyler and he mentions that during the 30 minute encounter he was under fire from aircraft (Oscars), cruisers, destroyers and picket boats. ( Looks like we need to check on VBP-106 also.)
Here is a description of the incident:
http://modelingmadness.com/others/fe...sagareport.htm