John Pinder is Port Hydrographer at Port of London Authority. John went to sea with P&O as a deck officer cadet in 1975, serving as a deck officer for 12 years and gaining his Master Mariner certificate prior to coming ashore and doing a BSc in Nautical Studies at Plymouth. After a short time in command of a small Thames-based training ship he joined the PLA as a Hydrographic Surveyor in 1989, where he has been ever since, serving as Port Hydrographer for the last 18 years.