USS Missouri (left) and Iowa (right) prepare landing parties to Japan following the cessation of hostilities, taken August 20th, 1945. Note Missouri is easily identifiable by the quad 40 mount atop B turret, which is trained sharply to port.
Taken prior to the formal surrender, Missouri transfers crew to her sister in preparation for going ashore. With both ships sporting the latest in armament and radar suites, aircraft have not been neglected either; an SC-1 Seahawk can be seen on each of Missouri's catapults.
Note Iowa does not have a 40mm atop B turret due to her role as fleet flagship; the addition of such a tall mounting would obscure the vision of the lower levels of the heightened conning tower. As such, only single 20mm mountings have been placed there.
From the From the US Naval Archive [3000x2478]:
https://bit.ly/3M7uA5K