The STOP is a type of remote controlled weapon station manufactured by Aselsan of Turkey.
[1][2] The system can be fitted with either a 25 mm Oerlikon KBA or a M242 Bushmaster autocannon.
The mounting does not penetrate the platform (except cables), making it relatively simple to fit the weapon to ships.
[1][2] Electroptical suit of STOP is independent and separately stabilized.
Using its sight the STOP system can provide surveillance and target-tracking entirely without outside assistance, allowing it to function fully independently.