HMS Pursuer conducted a Small Arms Firing at sea to train and coach their  personnel in marksmanship principles.  

A statement from British Forces Gibraltar follows below:

The maritime environment provides a unique challenge in aiming at a moving target  from a moving platform. This requires a steady hand and regular training to ensure  the gunners maintain a high degree of accuracy.  

The serials train each gunner through various scenarios which concludes with an  assessment in their ability to engage a target at various ranges and speeds. Once  the gunner has achieved the required standard, they are authorised to conduct force  protection duties within the Royal Navy Gibraltar Squadron, a vital capability in  providing security to British Gibraltar Territorial Waters and demonstrating UK  Sovereignty.  

HMS Pursuer  has three positions to fire from, two positions from the flying bridge  and one on the forecastle. Each position is mounted with a General Purpose Machine Gun.  

HMS Cutlass has a similar configuration and will be capable of firing three  General Purpose Machine Guns.