YOUR correspondent, ROBIN O’Hara makes an interesting point (Letters, 20 June) about the curvature of the earth and implies the Navitus windfarm would be out of sight at sea level.

Methinks I detect a large slice of “tongue in cheek” here. He states that on the beach our horizon is about three miles and at 13 miles (Navitus from Bournemouth) the base of the monstrous pylons would be about 20 feet below the sight line of the average adult. However, this does leave about 635 feet above the horizon.

A large part of Bournemouth fringes Poole Bay on cliffs about 100 feet high. On a clear day it is possible to see way past St Catherine’s Point, the southernmost tip of the Isle of Wight, which is 25 miles away. With Navitus proposed at half that distance the gigantic blades would be practically in our back yards!

ARTHUR MAY

Wollstonecraft Road, Boscombe