Gulf of Tonkin Situation Report no. 2
1 page, dated 6th August 1964.
This report is based on the U.S. listening in to DRV (Vietnamese) communications.
U.S. attacked DRV PT boat bases on August 5, 1964. According to DRV communications, nine craft were reported damaged or lost though the report says
this was far below current estimates.
According to DRV communications, DRV naval authorities were fearing another attack and ordered vessels to disperse and camouflage.
Their list of damaged/lost vessels were as follows:
One unidentified vessel in Ben Thuy area probably lost,
One unidentified unlocated vessel probably damaged,
T336 disabled (damaged in the attack on the Maddox),
T125 damaged,
5 unidentified vessels subordinate to a probable Flotilla 27,
were damaged Vinh oil storage facilities reported as bombed but extent of damage not reported.
All about the Gulf of Tonkin incident here:
Wikipedia

The Gulf of Tonkin Incident defined the beginning of large-scale involvement of U.S. armed forces in Vietnam. It was a pair of supposed attacks
carried out by naval forces of the Democratic Republic of Vietnam (North Vietnam) against two American destroyers, the USS Maddox and the USS Turner
Joy. The incident occurred on August 2 and 4, 1964 in the Gulf of Tonkin.
The outcome of the incident was the passage by Congress of the Gulf of Tonkin Resolution, which granted President Lyndon Johnson the authority to
assist any Southeast Asian country whose government was considered to be jeopardized by "communist aggression". The resolution served as Johnson's
legal justification for escalating American involvement in the Vietnam Conflict, which lasted until 1975.
In 2005, it was revealed in an official NSA declassified report that the Maddox first fired warning shots on the August 2 incident and that there may
have been no North Vietnamese boats at the August 4 incident.