'H' Cave [N Entrance]

The 'H' cave consists of two tunnels going into the cliff in the NNE aligned S part of Trelung bay. These are linked by a third tunnel parallel to the cliff line, and about 10-15m in. This is the 'bar' of the 'H' and is 40 m long. The north tunnel is about 20-30m long and ends in a boulder beach. The south tunnel curves round to the right to about 348 degrees (N by W) and is 36 m long from the dividing pillar. The linking tunnel is kayak navigable in the top half of the tide. At 3.1 m ACD you have to avoid some boulders, which at 3.6 m are covered.

The N entrance faces E by S and has a sill whose lowest point is at 1.9 m ACD and is thus not navigable even into the N tunnel unless the tide is at least 2.3 m ACD. It is

Grey seals often haul out on the N beach. They also sleep/doze in the water along the joining tunnel; sometimes horizontal, other times nose up.

There are white deposits of calcium carbonate on the ceiling of the joining tunnel and the S extension - see photos 4-6 of the S entrance entry.

Notes: Access: by sea N from Catterline or S from Stonehaven. Entrances are visible from Trelung Ness.

The extension to the S tunnel has been measured; the bar is inferred from entrance NGR's and entrance facing directions. Other lengths, alt and VR of this entrance are estimates.

Links and Resources:

1st Ed OS 25 in has 'cave' corresponding to the S entrance, but no indication of this north entrance and no indication of any tunnel extent.
Photo 1 shows the S entrance slightly left of centre. The N entrance is further right; a rift arc curving right (N). There is a low wave-cut platform low island whose left is in line with the left side of the N entrance. On the extreme left is about half of Trough Cove middle entrance. 27 June 19.
Photo 2 This entrance is to the left of the small cave facing the camera. The prominent entrance in the far corner of the bay is the N entrance to Trough Cove. The near vertical line of the N side of the S entrance can be made out to the right of that white on grey. There is a small promontory of wave-cut platform which obscures the channel to the S entrance, but it is hard to make out.
Photo 3 shows this N entrance from closer to, on 2 July 19. At 16:06 BST the tide level was 3.7 m ACD.
Photo 4 similar to photo 3, but at tide level 1.2 m ACD on 31 May 23.
Photo 5 looking out more or less E from inside the N tunnel towards the S side of Trelung Ness. The rift coming down has the Trelung Ness Subterranean passage underneath it.
Photo 6 shows the N beach; taken on 24 Aug 20 at 16:34. Note the calciferous deposits in the shadow on the right wall.
Photo 7 the right (N wall) with this entrance on the right (E). Taken immediately after photo 6.

This entry was last updated: 2024-11-12 12:55:13

Errors or omissions in this information? Submit corrections/additions/comments for this entry to the registrars.

NGR:	NO 87908 81549
WGS84:	56.92508, -2.20027
Length:	115 m
Vert. Range:	8 m
Altitude:	1.9 m
Geology:	Whitehouse Conglomerate Formation
Tags:	Other
Registry:	main

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