usamp "col. horace f. spurgin" mp-14 is known to have served in sausalito, california at fort baker's submarine mine depot supporting the san francisco bay coast artillery defenses with the usamp "gen. samuel m. mills." the ship became the prototype for correction of a deficiency in engine order telegraphs to extend them to bridge wings. one commercial system was installed on usamp "col. alfred a. maybach" while a second, fabricated and installed by chief engineer cwo john b. may, aboard "col. horace f. spurgin" became the recommended correction for all m1 type mine planters.