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Phoenix Caisson (outer) is a Second World War defensive structure located off Pagham Harbour in West Sussex. It forms part of the Mulberry Harbour system, the prefabricated artificial harbours constructed to support the Allied invasion of Normandy in 1944. The caisson is a large reinforced concrete box structure designed to be towed into position and sunk to create a breakwater, forming an essential component of the temporary port infrastructure. The structure remains in situ as a submerged archaeological monument, representing a significant example of wartime engineering innovation and amphibious warfare logistics.
Phoenix Caisson (outer) off Pagham Harbour is a scheduled monument protected by Historic England under reference 1452912. View the official record →
Phoenix Caisson (outer) is a Second World War defensive structure located off Pagham Harbour in West Sussex. It is designated a Scheduled Ancient Monument by Historic England (NHLE) under reference 1452912.
Phoenix Caisson (outer) off Pagham Harbour is a Scheduled Ancient Monument, legally protected by Historic England (NHLE) — the body responsible for designating and safeguarding heritage sites in England. The official designation reference is 1452912.
Several scheduled monuments lie within 10 km, including Phoenix Caisson (inner) off Pagham (2.4 km), Beckett's Barn and adjoining earthworks (4 km), Ringwork south of St Wilfred's Chapel (4.4 km).
This page is just one thread. A full Aubrey report pulls together 15 strands of Phoenix Caisson (outer) off Pagham Harbour's history, each drawn from the record and mapped to the exact spot:
Every location is different. Not every section appears for every place, only what the historical record actually holds turns up in a report.
Phoenix Caisson (outer) off Pagham Harbour stands on Eocene claystone, bedrock that formed in the Eocene. The rock here is claystone.