Brownson conducted shakedown in the Atlantic and Caribbean and was then placed in a reduced operational status at Bath, Maine for six months.

On 10 February 1947, a boat party attempted to make a landing in the Antarctic on Charcot Island but was unsuccessful because of heavy field ice within three miles of the coastline.

https://m.youtube.com/watch?v=Aga-fA6iUm4&pp=ygUTb3BlcmF0aW9uIGhpZ2gganVtcA%3D%3D Brownson spent the summer and fall of 1947 operating out of Naval Station Newport, Rhode Island.

Brownson was fitted with a variable depth sonar receiver which could be lowered into the sea from a boom attached to the fantail of the ship.

This included removal of gun mount 52, where anti-submarine torpedo launchers were placed, with a DASH (Drone Antisubmarine Helicopter) deck/hangar added aft.

Brownson spent several years operating out of Newport with DESDEVGRU-2 (Destroyer Development Group Two) evaluating the sonar system.

Brownson was required to operate during heavy storms to evaluate the new rubber dome under conditions of high sea states.