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1. A landmark visible from the sea, used as a guide in navigation.
2. A buoy or channel marker.
3. A transient natural feature, such as a clump of floating vegetation or a flock of birds in flight, that gives a rough indication of the proximity or direction of land, used as a navigational guide in some traditional seafaring cultures.


(Nautical Terms) nautical an aid to navigation, such as a conspicuous object on a shore used as a guide



a conspicuous object on land, visible from the sea, serving to guide or warn mariners, as a beacon.
References in classic literature ?
These are the official seamarks for the patch of trust- worthy bottom represented on the Admiralty charts by an irregular oval of dots enclosing several fig- ures six, with a tiny anchor engraved among them, and the legend "mud and shells" over all.
The Hi-Tech Park Authority signed three other deals with Seamark (BD), TechShed and PayZaBD.
Executive Officer at Seamark Asset Management, President and Chief
Throughout his career, he has held several executive positions including, but not limited to, President and Chief Executive Officer at Seamark Asset Management, President and Chief Operating Officer at Blackmont Capital and, Managing Director, Head of Wealth Management for CIBC Oppenheimer's US distribution business.
After losses to the USA and Italy, coach Iestyn Harris has jettisoned ineffective half-back Mark seamark and called up Keighley's Danny Jones in the search for more creativity near the opposition line but the Cooks still look a decent bet at 11-8 to record their first World Cup win.
Winger Rhys Williams, half-back Matt Seamark and centre Ian Webster all drop out of the team that lost to the USA as Wales coach Iestyn Harris looks to find an elusive winning formula in the final Group D game.
Joshua Mantellato of Italy scores a try despite the efforts of Rhys Evans, left, and Matt Seamark of Wales during the Rugby League World Cup group match on Saturday.
White's half-back partner Matt Seamark was also flattened, being the victim of a pile-driving tackle from Tedesco.
WALES (probable): R Evans, Williams, Lloyd, Frizzell, Kear, White, Seamark, Kopczak (capt), Budworth, Dudson, Patrick, B Evans, Flower.
WALES Squad: Neil Budworth (Moranbah Miners, Australia), Ross Divorty (Halifax), Gil Dudson, Ben Flower, Rhodri Lloyd (all Wigan), Jake Emmitt, Jordan James (both Salford), Ben Evans, Elliot Kear (both Bradford), Rhys Evans, Rhys Williams (both Warrington), Dan Fleming (Castleford), James Geurtjens (Norths Devils, Australia), Danny Jones (Keighley), Craig Kopczak, Larne Patrick (both Huddersfield), Peter Lupton (Workington), Rob Massam, Christiaan Roets (both North Wales), Matt Seamark (Wynnum Manly Seagulls, Australia), Anthony Walker (St Helens), Ian Webster (Central Queensland Capras, Australia), Lloyd White (Widnes).
After all the hoo-hah with horse meat, we're thinking of offering croc-burgers if we catch it," Golf shop manager Richard Seamark told the Daily Mail.
Scrum-half Matty Seamark added the touchline conversion to at least give Harris something to build on at the break.