Sightline, an unobstructed line-of-sight between a subject and object
However, challenges faced the Americans stationed there from the outset – on the first night that the Americans spent on the ground, harsh winds destroyed many of the Americans' boats, and on the second night a blizzard reduced the base's line of sight.
Pico das Agulhas Negras can be seen to the northwest of Resende when driving between São Paulo and Rio de Janeiro on the Via Dutra highway, but this is only possible at a few points on the road, because of a lower mountain range close to the road that stands in the line-of-sight at most close places.
In Rodinsky's Room, a book by Iain Sinclair and Rachel Lichtenstein about David Rodinsky, they mark the tower at L. C. C. Claybury Mental Hospital, as the "fixed compass-point from which Rodinsky drew his circuits of London. All his maps were based on that sightline" (Dark Lanthorns 32).