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13th order - GPS	3rd order	4th order
Active station	Admin/Changes	Admin/Links
Anatomy	Anomalies	Arcre
Beacon	Berntsen	Bilby towers
Block	Bolt	Brass Plate
Buried Block	Cairn	Cannon
Centre	Commemorative plaques	Concrete Ring
Corporal Curry	Covered Bolts	Crested trig pillars
Curry Stool	Cut	Disc
Duplicate FBs	FBM	Fenomark
Ferrule block	Flush Bracket	Flush bracket
Fundamental Benchmark	GPS Station	GPS plaques
Garden Trig pillars	Garden trig pillars	Gravity Station
Great Glen Project	Hole	Hydrographic Survey Station
Hydrographic survey station	Intersected Station	Lamp
Links	Maps	Mark
Meharkhan	Memorial	Metal detector
Missing FBs	NCE Adjustment	Non-OS marks
OS Sketch Diagrams	Old trig	Order
Order Table	Other	Palmerston forts
Passive station	Passive station names	Peg
Pillar	Pipe	Platform Bolt
Plug	Pole	Post
Primary	Project Emily	Punch mark
Pylon	Questionable Names	Rediscovered trigs
Rediscovered trigs 2023	Rivet	Rod
Sandbox	Sea Level	Searcher
Secondary	Secondary blocks	Sighting Tubes
Special Project pillars	Spider	Stone
Surface Block	TP7287 Newc	TP7287 Newcastle Active Station
The History of the Retriangulation of Great Britain	The National Archives	Theodolite
Tide gauge	Topograph	Trig Stations of the 19thC Principal Triangulation
Trigpoint	TrigpointingUK	Trigpoints
Trigs timeline	Turret	Types
Unused trigpoints	Unusual trigpoints	Upper centre mark
Vanessa	Wire	Witness mark

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