The Vickers-Armstrong shipyard at Barrow-in-Furness built all five "Strath"-class liners.5 Strathnaver was launched on 5 February 1931,6 completed in September 19317 and left Tilbury on her maiden voyage on 2 October.8
In 1929 P&O had introduced its first large turbo-electric liner, RMS Viceroy of India. The company chose the same propulsion system for Strathnaver and Strathaird, but the "Straths" were slightly larger ships, their turbo-electric equipment was much more powerful9 and they were about 3 knots (5.6 km/h) faster than Viceroy of India.
Strathnaver and Strathaird were very similar. Each had four water-tube boilers and two auxiliary boilers.10 The boilers had a combined heating surface of 56,000 square feet (5,203 m2) and supplied steam at 425 lbf/in2 to two turbo generators.11 These supplied current to two electric motors with a combined rating of 6,315 NHP12 or 28,000 shp.13 British Thomson-Houston of Rugby, Warwickshire built the turbo-generators and motors.14 The motors drove a pair of inward-rotating15 screw propellers.16 Strathnaver and Strathaird had three funnels but only the middle one served as a smoke stack: the first and third funnels were dummies.17
Strathnaver and Strathaird were each equipped with direction finding equipment, an echo sounding device and a gyrocompass18 As built, Strathnaver had accommodation for 498 first class and 668 tourist class passengers and 476 crew.19 In first class the ship had 262 single-berth rooms with the rest double-berthed, a special suite on "D" deck had 12 de luxe cabins each with a private bathroom.20 The tourist-class cabins were either two or four-berthed.21
The ship was launched at Barrow on 5 February 1931 by Lady Janet Bailey, daughter of Lord Inchcape, the Chairman of P&O.22
Strathnaver and Strathaird mostly worked the Tilbury–Brisbane route23 via the Suez Canal.24 They also undertook occasional cruises.25
In October 1938 the ship was chartered to move 1,200 British troops from India to Palestine.26
In 193927 or 194028 the two sisters were requisitioned as troop ships. Strathnaver's war service included bringing Australian and New Zealand troops to Suez and Allied troops to the Anzio landings.29 She remained a troop ship until November 1948, when she was returned to P&O.30 In her nine years of government service she carried 129,000 troops and travelled 352,000 miles.31
P&O had Harland and Wolff in Belfast refit her for civilian service. First class was abolished and all accommodation was made tourist class, which slightly increased total passenger capacity from 1,168 to 1,252.32 The dummy first and third funnels were removed,33 which made Strathnaver look more like her later sisters Stratheden, Strathallan and Strathmore. Strathaird had already had her dummy funnels removed in 1947.34 When she returned to service in 1950 she had accommodation for 567 passengers in first-class and 458 in tourist-class.35
Originally planned to be retired in mid-1962 the Strathnaver was retired a few months earlier due to an Australian government decision not to reserve any more berths for migrants in the first five-months of 1962.36 P&O sold Strathnaver and Strathaird for scrap to Shun Fung Ironworks of Hong Kong.3738 Strathnaver arrived in Hong Kong in April 1962 on her last voyage.39 Canberra replaced both Strathnaver and Strathaird on the Australia route.40
Talbot-Booth 1942, p. 534. - Talbot-Booth, E.C. (1942) [1936]. Ships and the Sea (Seventh ed.). London: Sampson Low, Marston & Co. Ltd. ↩
Harnack 1938, p. 559. - Harnack, Edwin P (1938) [1903]. All About Ships & Shipping (7th ed.). London: Faber and Faber. ↩
Talbot-Booth 1942, p. 397 - Talbot-Booth, E.C. (1942) [1936]. Ships and the Sea (Seventh ed.). London: Sampson Low, Marston & Co. Ltd. ↩
Lloyd's Register of Shipping (PDF). London: Lloyd's Register. 1937. Retrieved 30 April 2013. https://plimsoll.southampton.gov.uk/shipdata/pdfs/37/37b0833.pdf ↩
"R.M.S. Strathnaver in Simon's Town". Simon's Town Archives. Retrieved 30 April 2013. http://www.simonstown.com/archives/stdc_aa_02-011.htm ↩
"P. And O. Liner Launched". The Times. London. 6 February 1931. p. 11. ↩
"The Strathnaver". The Times. London. 5 September 1931. p. 7. ↩
Goossens, Reuben (2011–2012). "RMS Strathaird". P&O Line. SS Maritime. Retrieved 30 April 2013. http://www.ssmaritime.com/strathaird.htm ↩
"News in Brief". The Times. London. 10 October 1938. p. 14. ↩
"Strathnaver Back In Service". The Times. London. 4 January 1950. p. 2. ↩
"Two Liners To Be Broken Up". The Times. London. 12 December 1961. p. 6. ↩
"News in Brief". The Times. London. 3 April 1962. p. 10. ↩