Get to the Turret is a mission in Ratchet & Clank, taking place in Fort Krontos on planet Batalia. After Ratchet and Clank fought through with Cora Veralux to travel to the Fort, they found it inaccessible due to laser turrets blocking the immediate entrance to the port. Cora then noted that they needed to find another way inside.
With the Magneboots, you will be able to travel up the magnetic path, with unrestricted movement, though you are limited to just the OmniWrench. Follow this path, leaping over hazards and using the wrench to destroy versa-mines that appear, and you will arrive inside Fort Krontos. Here, destroy the bladeballs, blarg generator, and the warbots, then take the path up to the right to reach a bolt crank. By activating it, you will extend the bridge and disable the turrets, allowing Cora to cross.
After this, several warbots and blarg bombthrowers will arrive, as well as two cannonball tanks as you proceed further into the fort. Destroy both and the remaining enemies to find a bolt crank in front of a large door leading to the exit and towards the Starwatch Cannon. Before you activate the crank, head left first to a big stack of crates, but do not bash them; instead, jump to the top of this stack to reach the upper level, then head left to find a gold bolt perched on top here.
Upon activating the bolt crank and opening the door, you will extend a bridge ahead leading to the Starwatch Cannon. Once you reach the cannon, the mission "Destroy the battleships" will commence.