Hi MDK2.
P5O is known as the Indonesian Navy from its communications center in Surabaya. You caught them on 9162,0 kHz as CF or with an offset? But despite that it is a new frequency to me. I have it listed on (all kHz CF) 6365,0 / 9845,0 and 12235,0 kHz.
A partner station is 7CB from commcen Belawan, operating on 9945,0 / 12235,0 and 18980,0 kHz (CF).
Hope this helps.