ROYAL NAVY SOUTH ATLANTIC COMMAND - ROYAL NAVY P
6)PHYLLISIA (BOOM DEF VESSEL)
Image by A. I.
During World War II, the boom defence vessel HMS Phyllisia (Pennant Z 180) played a vital tactical role in harbor protection, anti-submarine net deployment, and local maritime security at the strategic port of Takoradi, Ghana (then known as the Gold Coast).
Operating under the Royal Navy's South Atlantic Command, HMS Phyllisia was a specialized Bar-class boom defence vessel launched in 1942. It displaced approximately 730 tons and was built with a distinctive bow design featuring protruding metal "horns" specifically engineered to lift and secure heavy underwater steel cabling.
Core Strategic Roles at Takoradi
Securing a Critical Assembly Point: Takoradi was a highly important logistics hub for the Allies. It served as the starting point for the "Takoradi Route," a vital air corridor where thousands of crates of disassembled Allied fighter planes (like Hurricanes and Spitfires) were unloaded from ships, reassembled at the local airfield, and flown across Africa to Egypt to support the North African campaign. Protecting this specific harbor from German U-boat or torpedo attacks was paramount, and HMS Phyllisia was tasked with deploying and maintaining the extensive anti-submarine steel mesh boom networks that sealed off the port entrance.
Gate-Ship Operations: Because the heavy anti-submarine and anti-torpedo nets completely blocked the harbor to prevent enemy infiltration, HMS Phyllisia acted as a guardian gatekeeper. Using its powerful onboard winches, the crew opened the underwater gate section to safely usher in arriving Allied merchantmen and naval escorts, immediately sealing the barrier shut behind them.
Mooring and Heavy-Lift Infrastructure Support: The waters off West Africa were subject to strong tropical currents and severe coastal swells, which placed immense physical strain on harbor defenses. HMS Phyllisia used its heavy bow horns and winch machinery to continuously service, lay, and lift the massive anchors, sinkers, and spherical steel flotation buoys required to keep the defensive network tightly positioned.
Local Harbor Auxiliary Patrols: When not actively working on the boom cables, the vessel provided general security presence within the port limits, assisting in enforcing nighttime blackout regulations and guarding clustered, vulnerable cargo ships against saboteurs.
By maintaining this impenetrable physical shield at Takoradi, HMS Phyllisia ensured that the vital pipeline of Allied aircraft, fuel, and raw materials could be offloaded securely without the risk of devastating sneak attacks from Axis submarines in the Gulf of Guinea.
