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NavSource Online:
Section Patrol Craft Photo Archive

Emerald (SP 177)

Civilian call sign (1919):
King - Vice - Love - Boy

Patrol Yacht:

  • The second Emerald was built in 1906 as Emrose by Pusey and Jones, Wilmington, DE for A. W. Rose of New York
  • Renamed Emerald
  • Acquired by the Navy 23 July 1917 and placed in service as USS Emerald (SP 177) the same day
  • Placed out of service 12 December 1918 and returned to her owner, Maxwell Wyeth of Philadelphia, PA
  • Fate unknown.


  • Displacement 198 t.
  • Length 163'"
  • Beam 21'
  • Draft 10'
  • Complement 43
  • Speed 13.5 kts.
  • Armament: Two 6-pounders and two machine guns
  • Propulsion: Two Almy water tube boilers, one 500hp vertical quadruple expansion steam engine, one shaft.
    Click on thumbnail
    for full size image
    Size Image Description Source
    Yacht Emrose
    Emerald 44k
    USS Emerald (SP 177)
    Savitar 52k

    Emerald is a gemstone and a variety of the mineral beryl colored green by trace amounts of chromium and sometimes vanadium. Beryl has a hardness of 7.58 on the Mohs scale. Most emeralds< are highly included, so their toughness (resistance to breakage) is classified as generally poor. Emerald is a cyclosilicate

    Tommy Trampp
    Photo added 10 September 2020
    Emerald 63k At anchor, with laundry drying on her foremast rigging, circa 1918. The stern of a submarine chaser (SC) is visible in the left background
    U.S. Navy photo NH 54369
    Naval Historical Center
    Emerald 76k In harbor, circa 1918. A four-masted schooner is in the left background
    U.S. Navy photo NH 54370
    Emerald 79k Operating in the ice, circa winter 1917-1918
    U.S. Navy photos NH 101703 and NH 101704
    Emerald 64k

    Commanding Officers
    01LT Maxwell Wyeth, USNRF - Awarded the Navy Cross (1918)23 July 1917 - 12 December 1918
    02ENS Albert J. Brune, USNRF12 December 1918
    Courtesy Joe Radigan

    View the Emerald (SP 177)
    DANFS history entry located on the Naval History and Heritage Command website
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    This page created by Joseph M. Radigan and maintained by David Wright
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