High Quality Content by WIKIPEDIA articles! HMS Biter (P270) is an Archer-class P2000-type patrol and training vessel of the British Royal Navy. She is assigned to Manchester Salford Universities Royal Naval Unit, a Royal Naval Reserve unit based in Manchester. The ship is based at HMS Eaglet, the Royal Naval Headquarters (Merseyside) in Liverpool. As part of her sea training programme, she often makes visits to local ports for ceremonial visits or occasions.