 "Shubrick" spent the next three years setting buoys and carrying lighthouse supplies along the Pacific coast.On 23 August 1861, on the outbreak of the Civil War, she was transferred to the Revenue Cutter Service.Commissioned on 15 October 1861 under the command of Revenue Captain William Cooke Pease, she served under Revenue Cutter Service orders for almost four years, performing customs and law enforcement duties, based first out of San Francisco, and then at Port Townsend from June 1862.