Jens Pattke spotted the link of
Interscan Schiffahrt - white with narrow red stripe on top and bottom;
in the center black letters IS.
Santiago Dotor, 11 Nov 2003
Interscan Reederei #2
image by Jarig Bakker, 19 Oct 2005
Interscan Reederei G.m.b.H., Hamburg - Spanish-style RWR, in
center black "IS".
Image after Brown's Flags and Funnels Shipping Companies of the World,
compiled by J.L. Loughran, Glasgow, 1995 [lgr95]
Jarig Bakker, 19 Oct 2005