The Manila Times, Monday, 9 July 1945
The patrol combatants Pasay and Pateros were completed today at the Butuan naval shipyard and have embarked on trials.
Destroyer Gavion, 20 dgs, 48 min North, 121 dgs, 29 min East, Wednesday, 11 July 1945
Commander Bernabe Villacampo was feeling good about the progress his crew were making in their post-refit workup; they were becoming familiar with the new systems aboard the ship, and the ship itself was handling well. Together with the recently-refitted Buitron the Gavion was running tracking drills with the submarine Sello, exercising the crew in the proper use of the SPR-44 hidrofono the Chilean specialists had installed during the ship’s refit.
“Hidrofono contact bearing zero-four-zero,” came the report from the sound operator.
“Left rudder twenty degrees,” Villacampo ordered. “Start a track. Let’s see if we can rattle the Sello a bit.”
The destroyer homed in on the underwater contact, adjusting to the twists and turns of the target. “Go active” Villacampo ordered; “Let them know we are on to them.”
The transducer inside the hidrofono unit activated and a powerful “Ba-wha” echoed through the waters of the China Sea. “Target bearing zero one zero,” the sound man reported. “Distance three hundred meters.”
“Left rudder ten degrees, speed fifteen knots,” said Villacampo, “Prepare to drop noisemakers.” The destroyer made its simulated attack run and a party on the fantail dropped a cluster of small explosive charges that would signal the Sello that it had been found. Moments later a splash of water signaled that they had done their work.
“Target changing course and depth,” reported the sound operator. “Bearing one one five, distance one hundred meters, depth forty meters.”
“Trying to turn under us?” Villacampo said aloud. “Very well, let’s make it a good exercise.”
The Gavion stayed with the target, pinging the water with the hidrofono to keep the Sello located, making simulated attack runs every few minutes. Villacampo signaled the Buitron to let her captain know that the Sello was making a great show. The executive officer brought the Buitron’s reply a few moments later.
“Sello alongside after completion of simulated attack,” the response read. “Target is not Sello – repeat – target is not Sello.”
“If it is not the Sello,” Villacampo thought, “then what submarine is it?”