Armed Merchant Cruiser
The Admiralty then had Laurentic converted into an AMC. She was armed with eight QF 6-inch naval guns and two 6-pounder guns. On 25 November 1914 she was commissioned as HMS Laurentic, with the pennant number M 71.[17]
In December 1914 Laurentic sailed from Liverpool via Sierra Leone and Lagos to Kamerun, where she assisted in the Kamerun campaign. In September the Royal Navy had captured several German merchant ships that had sought refuge in the Wouri estuary. On 26–30 December Laurentic discharged prize crews from five of the captured ships.[17]
In January 1915 Laurentic returned via Lagos, Accra, Sekondi and Sierra Leone to Birkenhead. In Accra and Sekondi she embarked German civilian internees.[17]
In February 1915 Laurentic sailed to Gibraltar. She then patrolled to São Vicente, Sierra Leone and Kamerun until at least April. By July she was in the Indian Ocean off Mozambique heading for Durban, where she called on 2–4 August. She then crossed the Indian Ocean, coaling at Colombo in Ceylon on 18–19 August and reached Singapore on 25 August.[17]
From September 1915 to January 1916 Laurentic patrolled the Bay of Bengal, visiting Port Blair, the Hooghly River, the coast of Balasore and Rangoon. On 30–31 January she called at Singapore before sailing for Hong Kong.[17]
On 5 February Laurentic stopped the Japanese merchant ship Tenyo Maru off the Philippines and sent a boarding party aboard. They arrested nine Indian nationals "travelling without bonafides of any description",[17] who were suspected of being Hindu nationalists. Japanese newspapers claimed that the action violated international law. The Japanese Minister for Foreign Affairs, Ishii Kikujirō, said that the Japanese Government was investigating.[18]
On 22 February Laurentic reached Hong Kong. She patrolled Chinese waters until 15 March, then spent a week in Hong Kong before returning to Singapore, where she arrived on 30 March.[17]
In April 1916 Laurentic returned to Hong Kong, where she was refitted from 24 April to 2 June. She then returned to Singapore, made a brief patrol to Penang and back and on 28 June left Singapore for South Africa.
Two gold shipments to Canada
Laurentic called at Simon's Town 17–19 July, bunkered in Cape Town on 20 July and then on 23–24 July loaded bullion to take to Canada.[17]
Laurentic left Cape Town on 25 July 1916, reached Halifax, Nova Scotia on 15 August and discharged her cargo of bullion. She spent September and the first half of October patrolling the east coast of Canada and then south to Bermuda, where she spent 14–27 October in port and loaded specie. By 30 October she was back in Halifax, where she unloaded the specie and spent four weeks in port before leaving on 27 November for Liverpool.[17]
On 1 December it was discovered that coal in Laurentic's number two hold was on fire. Her crew started to remove coal from the bunker. A dislodged beam struck Commander Mathias, fracturing his skull. On 2 December the crew finished removing coal from the hold and threw 150 tons of charred coal overboard. On 4 December Cdr Mathias died of his injury. Laurentic reached Birkenhead on 6 December.[17]