Marinduque was transferred from the
Philippine Commission to the Coast and Geodetic Survey for Philippine survey work on November 1, 1905. For operations in the Philippines the U.S. Government paid salaries, cost of travel to and from the Philippines and expenses for the U.S. Coast and Geodetic Survey officers aboard the ships. The insular government paid crew salaries and expenses as well as having ownership of the vessels excepting the
Pathfinder. All crews were Filipino.
Service history Marinduque left Manila December 10, 1905 for her initial surveys on the west coast of
Leyte between
"Illongas" and
"Polompon", then after a period in Manila April 10–23, 1906, the east coast of
Luzon between
Atimonan and
Polillo island. P. E. Angell, one of ''Marinduque's'' mates, drowned while attempting to reach a small boat anchored off
Sigayan Point in
Illana Bay on the south coast of Mindanao. On more than one occasion,
Marinduque had occasion to assist mariners in distress. On 21 October 1916, she came to the aid the
schooner Florence, which was in distress with her
sails blown away, part of her
rigging gone, and her food and water low;
Marinduque towed
Florence to
Coron on
Palawan and then took
Florences
captain from Coron to Manila on
Luzon. On 7 July 1927, she helped the
British steamer Paipeng, which was aground on
Cap Island in the Philippines;
Marinduque took off the majority of
Paipengs passengers and transported them to
Jolo. The ship was transferred to the Insular Bureau of Labor March 19, 1918 and alterations made for use as an inter-island cargo ship with its condition on return to the Coast and Geodetic Survey July 7, 1919 requiring work restoring the ship to seaworthy condition and suitability for surveys until September 26, 1919. During 1920, due to the Navy's discontinuing coaling of the C&GS ships, work took place convenient to an offer of coal by the governor of
Mindanao and coal mines at
Sandakan,
Borneo where
Marinduque surveyed in company with
Pathfinder on the west coast of Mindanao, the
Sulu Sea and
Palawan closest to the coaling station at Sandakan. Much of ''Marinduque's'' work involved establishing the a triangulation network on the west coast of Mindanao on the
Zamboanga Peninsula for survey navigation.
Marinduque, in Manila and just after extensive repairs, was fouled by another ship that broke from moorings during a typhoon that hit the city August 31, 1920 and sustained considerable damage while
Romblon lost a whaleboat and the Manila tide station was demolished.
Marinduque was inactive July 1, 1920 through March 15, 1921 with
Romblon inactive the entire fiscal year due to inability to furnish C&GS officers for the ships and full reports only cover
Pathfinder and
Fathomer as actively surveying. From March 16 through May 13
Marinduque worked
Bacoor Bay,
Cavite and from May 24 through June 30 in
Albay Gulf and
Lagonoy Gulf. == Fate ==