Hamburg-Deutsche Atlantik Linie.
The company was located in Hamburg. It is a red flag with a charge
composed of three arrow heads pointing towards the centre but laid out
as illustrated. As far as I know, the flag was used exclusively for two
cruise liners, the HANSEATIC, and the (new) HANSEATIC. The funnel had the
same pattern with a black top.
Source: Arnold KLUDAS: Die Geschichte der deutschen Passagierschiffahrt
(5 Bde.) Hamburg 1986; Reprint Laibach Slovenia-Buch Nr. 03617-8 Flagchart
Klaus-Michael Schneider, 17 Apr 2009
Hamburg-Deutsche Atlantik Linie variant
image by Scott Swendsen, 4 Nov 2009
I came across a desk size version of this flag at a resale shop, I've
attached a photo of it.
It shows that the two arrow heads go on top, as shown on the House
Flag of the World Identifier web site. There is a site
called Simplon Postcards at that shows post cards of four ships that
seem to have sailed under this flag. Three named Hanseatic and one named
Hamburg that was renamed the hanseatic after the second was sold. A third
company, Hanseatic Tours, was formed in 1991 by the former captain of the
last german registered Hanseatic of Deutsche Atlantik Linie. He bought
the rights to the Deutsche Atlantik Linie logo and the name Hanseatic.
Hapag-Lloyd took over the company in 1997.
Scott Swendsen, 4 Nov 2009
image by Klaus-Michael Schneider, 21 May 2009
The flag is the same like that one of Deutsche Atlantik Linie but has a different ratio, according to source 19:15.
Source: Klaus-Peter Bühne's webpage Klaus-Michael Schneider, 21 May 2009