They were fitted with a unique Vickers-designed 4-inch dual purpose naval gun, which fired up to 50rpm.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request. ### Instruction: List the MITRE techniques contained in the text. ### Input: They were fitted with a unique Vickers-designed 4-inch dual purpose naval gun, which fired up to 50rpm. ### Response: .