This was the first of two BI ships to be called Mulbera. The second was a motor ship that was built in 1971, renamed in 1975, sold in 1982, and scrapped in 1992.[1]
In 1920 Barclay, Curle built two more "M" class ships. The first, Mashobra, had triple expansion engines like her predecessors. The second, Manela, was the first member of the class to have steam turbines instead. They drove her twin propeller shafts via double-reduction gearing.[3]
Mashobra, an "M" class ship built in 1920
In 1921 and 1922 BI took delivery of a final six "M" class ships, all with geared steam turbines. They were about 20 feet (6 m) longer overall (about 16 feet (5 m) longer registered) than earlier members of the class, and had a cruiser stern instead of a counter stern. Swan, Hunter and Wigham Richardson built Modana, the first of this batch. Barclay, Curle built four: Madura, Mantola, Matiana, and Malda. Mulbera was unique, being the only "M" class ship built by Alexander Stephen and Sons.[4]
Building Mulbera
Stephen's built Mulbera at Linthouse in Glasgow for £511,000 as yard number 496. She was launched on 14 February 1922 and completed on 6 June. Her lengths were 483.0 ft (147.2 m) overall and 466.3 ft (142.1 m) registered. Her beam was 60.1 ft (18.3 m), her depth was 33.3 ft (10.1 m), and her draught was 28 ft 4 in (8.64 m).[5] Her tonnages were 9,100 GRT, 5,521 NRT, and 10,950 DWT.[6]
As built, Mulbera carried both first class and second class passengers. Some sources state that she had berths for 78 first class and 80 second class, but another states that it was 114 first class and 44 second class.[6][7]
Each of her twin screws was driven by a set of three-stage Parsons steam turbines. The combined power of her turbines was rated at 1,068 NHP[5] or 4,100 bhp. She achieved 13.58 knots (25.15 km/h) on her sea trials.[6] As built, her navigation equipment included submarine signalling.[5] By 1928 it also included wireless direction finding.[8]
Victoria Drummond, the first woman to qualify as an engineer officer in the UK, served on Mulbera from April 1927 until December 1928. But BI hired her only as Fifth Engineer, despite her being qualified as a Second Engineer. While Drummond served on her, Mulbera made one voyage to East Africa, and four to India and Ceylon.[14] BI's regular ports of call on this route were Gibraltar, Marseille, Port Said, Suez, Aden, Colombo, Madras (now Chennai) and Calcutta.[12]
On 8 June 1932 Mulbera collided with the British steamship Zitella at Kruisschans Scluis when approaching Antwerp. On 11 October that year she grazed the pier head while entering King George V Dock, London. She knocked some facing tiles off the pier, but suffered little damage.[6]
On 22 August 1933 she grounded on Ulenge Reef off Tanga, Tanganyika. With help from the BI ship Dumra and tug Kifaru she was refloated on 24 August. The friability of the coral reef prevented major damage to the ship.[6]
In 1935 Mulbera was converted into a one-class ship, with berths for 158 passengers.[6]
Second World War
In the Second World WarMulbera remained in passenger service, but under the direction of the British Indian government.[7] In March 1940 she was requisitioned for the Liner Division.[6]
Iron Crown, whose survivors Mulbera rescued in 1942