I have the utmost respect for the RAF[**] pilots who can hold a helicopter for minutes at a time without it moving. The closest I've been was when some climbers I'd given a lift to overestimated their abilities and available time, and nightfall found them still only half-way up a slightly overhanging sea cliff at Gogarth (Holy Island, just of Anglesey, north Walas). The helicopter hovered a few feet above the cliff edge (where it would catch every slight updraught) whilst the winch man (is that the right term?) was lowered on a line to swing in under the overhang and lift the lads to safety. The whole process took 20 or 30 minutes, and it was all inch-perfect.

[**] presumably also of other organisations worldwide, but the RAF is the only one I have any experience of.