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I am delighted to .. by Bleck Cra   (Show all posts)
Anyone planning on.. by Conor74   (Show all posts)
A small, if perfec.. by Bleck Cra   (Show all posts)
2011-07-08 23:18:53
Distant views
An approximate distance to Earth's horizon can be calculated by the formula: Distance = 3.86 SQRT (Height of observer). For a 800m peak this gives a maximum view to the horizon of about 109Km. However, you also need to take account of the height of the 'target'. The calculation above gives the range of the view to sea level at the horizon. You can also use the formula to take account of the height of the target and add the observer and target ranges together. Thus an observer on top of a 800m mountain would just see the top of another 800m mountain which is 109km+109km = 218km away. Of course the theoretical viewing range is unlikely to be met due to atmospheric conditions.
Thanks very much S.. by hbowman1   (Show all posts)
hbowman1 the dista.. by slemish   (Show all posts)
On the topic of lo.. by hbowman1   (Show all posts)
milo long distance.. by slemish   (Show all posts)
MCritchly's fine p.. by milo   (Show all posts)
Yes mcrtchly. Well.. by Bleck Cra   (Show all posts)

RECENT CONTRIBUTIONS 1 2 3 .. 15 Next page >>
Summit Comment
Kinnaveagh: Glenveagh
jackill 15 hours ago.
A photo looking down the beautiful Lough Beagh in Glenveagh national park with Kinnaveagh on the left overlooking Glenveagh castle and the Saggartnadooish ridge on the right.

An abridged Sheeffrys route
peter1 a day ago.
walk, Len: 13.0km, Climb: 763m, Area: Tievnabinnia South-East Top, Sheeffry Hil...

Summit Comment
Tievummera: Super Sheeffrys
peter1 a day ago.
St. Patrick's Day, 2018. Halfway through this traverse I was listening to radio commentary as Ireland won a famous Grand Slam! I decided on an E-W traverse as it seems nicer to be walking towards ...

Tievebaun and Truskmore SE Carn
peter1 a day ago.
walk, Len: 9.4km, Climb: 585m, Area: Tievebaun, Dartry Mountains (Ireland) Tiev...

Glenbeigh Loop
GSheehy a week ago.
That mare of a storm ?Emma? played havoc with the na Sl

Summit Comment
Tievebaun: A short, sharp cold snap
peter1 a day ago.
Following Colin Murphy's clearly described route, I parked just off the road adjacent to open hillside. The going across from Tievebaun to Truskmore can be boggy in parts but today was frozen, due...

Fuerteventura: La Oliva to Lajares.
simon3 a week ago.
This walk starts in La Oliva, which is served by various bus routes including one that returns from the finish. Casa de walk, Len: 16.7km, Climb: 333m, Area: Spain, Canary Islands ()

Forum: General
Thanks BlackCra
Aidy 2 weeks ago.
Thank you BlackCra for the extremely generous words on my photo - your description is truly humbling.

Summit Comment
Errigal: Donegal a High Point
BleckCra 2 days ago.
I was first introduced to Donegal 20 years ago. It was the Donegal of Buncrana, Bundoran and Ardara; of kiss me quick tourist towns, warm beer, hiked up prices and bored part time pub staff.I saw ...

Forum: General
Pilgrimage : The Road To Santiago
Jim Holmes 5 days ago.
Pilgrimage : The Road To SantiagoFriday BBC2 9pmMountainViews Irish Mountain Gathering preferred MC of choice - Ed Byrne - can be seen as he walks with friends (kind of) on a three part travelogue...

Forum: General
Aidy's "A" pic.
BleckCra 3 weeks ago.
Aidy's pic of the month ....... just sensationally good.That is not to say mountainviews' potms aren't all fabulous but are often it seems constrained (not, I imagine always by the photographer), ...

Lehaunstown to The Scalp
jgfitz a week ago.
This track is accessable by public transport. Starting at Lehaunstown Luas Stop (spelled Laughanstown by Luas), head ... walk, Len: 10.0km, Climb: 367m, Area: Carrickgollogan, Dublin/Wicklow (Ireland

RECENT CONTRIBUTIONS 1 2 3 .. 15 Next page >>