Houseflags of Norwegian maritime companies (S)

Josef Nuesse's "Ships and Flags" website shows the house flag of S. Bartz-Johannessen A/S, a Bergen-based company, as a blue triangular pennant charged with a white star tilted to the upper left corner. The same flag, with a different shade of blue, probably irrelevant, is shown as the house flag of Knarrevik-based AS Sigba, presented as ex-Rederiet Bartz-Johannessen.
Source: http://www.flagpole.de/reedereiflaggen/europa/nordeuropa/
Ivan Sache, 18 December 2013

Rederiet S. Bartz-Johannessen A/S, originally the company of Sigfinn Bartz-Johannessen, apparently became the holder company in the nineteen eighties. AS Sigba, probably from Sig(fin) Ba(rtz Johannessen), seem to be the company to do the actual overseas freight transport. There are other daughter companies for other aspects of the business.
Peter Hans van den Muijzenberg, 19 January 2014

S.F. Bruun

#68 S.F. Bruun, Tonsberg - white swallowtail, blue cross, blue disk, three white 5-pointed stars
Jarig Bakker, 2 January 2005

S.M. Kuhnle & Son. Bergen

image by Jarig Bakker
Source: The Caltex book of Flags and Funnels ^[15]

#47 - White flag narrow red stripe at top and bottom; blue 5-pointed star.
Jarig Bakker, 30 December 2004

image by Jarig Bakker
Source: Brown's Flags and Funnels of British and Foreign Steamship Companies, 1926 ^[9]

Bergen - white flag bordered red, blue 5-pointed star
Jarig Bakker, 8 February 2004

S.O. Stray, Christanssand (Kristiansand)

image by Jarig Bakker
Source: Brown's Flags and Funnels of British and Foreign Steamship Companies, 1926 ^[9]

Saltens D/S A/S

image by Jarig Bakker, 27 December 2005
Source: Brown's Flags and Funnels of Shipping Companies of the World ^[4]

Bodo - white "SDS" in a blue box in a white box in a red box.
Jarig Bakker, 27 December 2005

Scandinavian East Africa Line

Spanish fess of red-white-red with blue letters 'SEAL' in the central stripes, separated by small blue discs.
Jorge Candeias, 7 March 1999

The flag appears as a swallowtail in Josef Nüsse's house flags website: http://flags.seeleute.net/ as "S.E.A.L. - Scandinavian East Africa Line A/S - Oslo".

This webpage about nautical abbreviations mentions SEAL as "Scandinavian East Africa Line, Oslo - Norwegische Reederei" (i.e. Norwegian shipping company).
Santiago Dotor, 17 May 2005

The Scandinavian East Africa Line was the name the NAL used for their service to Madagascar. Hence the similarity of the flags. They started the service in 1921, and in 1981 it was sold to Deutsche Afrika-Linien, who seem to have absorbed it into their own services.
Peter Hans van den Muijzenberg, 19 January 2014

Seatrans Group

The company is specialized in transportation of chemical and forest products. The flag is swallow-tailed, blue with two thin white stripes near the top and bottom and a white S placed between the two white stripes and skewed towards the hoist.
Ivan Sache, 2 December 2003

Sea Truck Shipping A/S

Josef Nuesse's "Ships and Flags" website shows the house flag of Sea Truck Shipping A/S, a Sandnes-based company, as blue with a white saltire, in the middle a white oval charged with a blue "L".
Source: http://www.flagpole.de/reedereiflaggen/europa/nordeuropa/
Ivan Sache, 16 December 2013

Det Selmerske Rederi

Sigurd Herlofson & Co

image by António Martins-Tuválkin, 11 January 2009
Source: image of ship's flag on china cup submitted by Rita Henderson, 17 March 2007