The SS (RMS) Ellan Vannin was an iron paddle steamer constructed in 1860 by Tod and McGregor Ltd in Glasgow for the Isle of Man Steam Packet Company. Originally named Mona’s Isle, she was a significant vessel in the company's history, as she was the first to be fitted with oscillating engines, which offered advantages such as reduced space requirements and fewer working parts compared to the traditional side-lever engines. Her initial specifications included a length of 339 register tons, with a power output of 600 ihp (450 kW), enabling a cruising speed of approximately 12 knots. The ship featured improved feathering floats on her paddle wheels and was powered by a vertical, pivoting cylinder oscillating engine. In service from June 1860, Mona’s Isle proved notable for her technological innovations and resilience, despite occasional grounding incidents in 1873 and 1878. In 1883, after 23 years of operation, she was rebuilt, increasing her gross register tonnage to 375 and her speed to 12.5 knots. She was then renamed Ellan Vannin, the Manx name for the Isle of Man, and converted to a twin-screw vessel driven by a two-cylinder compound steam engine built by Westray, Copeland and Co. Her boiler pressure was increased to 80 psi, and she could carry 300 passengers with a crew of 14. She primarily operated on routes from Ramsey to Whitehaven, Liverpool, and Scotland, serving as a key mail carrier and passenger vessel. Ellan Vannin was regarded as an exceptionally seaworthy ship, even in stormy weather, and became a maritime mascot of the Isle of Man Steam Packet fleet, affectionately known as the “Li’l Daisy” by Manx sailors. Her service continued until December 1909, when she was deemed the oldest and smallest vessel in the fleet. On 3 December 1909, under Captain James Teare, she departed Ramsey in a storm with 15 passengers, 21 crew, mail, and cargo. Rapidly intensifying weather with hurricane-force winds and large waves caused her to strike a sandbank near the Mersey Bar lightship, leading to her sinking in Liverpool Bay. All passengers and crew perished, and her wreck was later destroyed due to hazard to shipping. Her loss marked a poignant chapter in Isle of Man maritime history, commemorated by poems, songs, and centenary stamps.

This description has been generated using GPT-4.1-NANO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.