On 15 January 1877, she collided with the schoonerJohn Bright at Holyhead, Anglesey, severely damaged the schooner. Shamrock rescued her crew and the schooner was beached.[2][3] On 9 October 1880, She ran down and sunk the schooner Hannah off the coast of County Dublin, killing three of the schooner's four crew. Shamrock rescued the survivor. The schooner was not showing any lights.[4] On 12 April 1881, she ran down and sunk the tugGeneral Havelock in the River Liffey. There were no deaths.[5]