Buoy Oh Buoy! Multi-Cache
Hanoosh: As the owner has not responded to my previous log requesting that they check this cache I am archiving it.
Regards
Brenda
Hanoosh - Volunteer UK Reviewer www.geocaching.com
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UK Geocaching Information
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Difficulty:
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Terrain:
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Size: 
(small)
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Buoys are essential in providing the mariner with visual orientation and spatial awareness. They also provide hazard, channel and waypoint marking.
Trinity House maintains nearly 500 buoys and inspects those maintained by port and harbour authorities, utility companies and by oil/gas rig and wind farm operators (totaling more than 10,000 Aids to Navigation).
Trinity House buoys are moored to the sea bed using a sinker constructed from cast iron with weights varying between 1 and 8 tonnes. The sinker is placed on the AP (Assigned Position). The weight of the sinker and the length of chain used to moor the buoy depend on the type of buoy, depth of water, strength of tide and the exposure of the buoy.
Most Trinity House buoys have two mooring eyes to which shackles are attached to two pieces of chain forming a bridle. The bridle runs down to a swivel allowing the buoy to rotate and prevents the bridle from twisting and dragging the buoy under the water. From the swivel, a length of chain (known as a riser) runs to a sinker on the sea bed.
Equipment can be added to buoys to provide additional services such as the transmission of AIS, meteorological and hydrological data.
Fortunately the two buoys you are looking for are no longer in use and are thus on shore.
At the given co-ordinates you need to find the following information:
SWALLOW TAIL
Trinity House ABCD
How many bolts are there around the circumference of the 'circle' on the buoy? = E
Excluding those already counted, how many additional bolts (of all sizes) are inside this circle? = F
INNER CROUCH
Trinity House London GHJK
How many bolts are there around the circumference of the 'circle' on the buoy? = L
Excluding those already counted, how many additional bolts (of all sizes) are inside this circle? = M
The cache can be found at
N 51 37. (A+C) B (A-F)
E 000 48. (F+G-K) ((L/E)*D) (H-M-D)
Additional Hints
(Decrypt)
Pyhrf - Qba'g jbeel vs W vfa'g pyrne nf lbh qba'g arrq vg sbe gur pnyphyngvbaf.
Pnpur - GUK
Treasures
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