SUARDIAZ.

The 1954 Spanish register clearly gives AS for V316. V10 may read AS or RS, with Rosanoski initially favouring RS. US Navy’s S1816 first letter is ambiguous, though its index places the company under A. Stewart’s S36 has a red six-pointed star bearing a white circle with red AS. A later rendering extends A’s crossbar towards the hoist, which Rosanoski says was absent from the source image he supplied.

The earlier FOTW version is a white triangular flag bordered dark red, with a dark-red disc near the hoist containing a white six-pointed star and letters tentatively read as RS. The original image was too small for certainty.

Spanish and Basque flag websites show a second pennant with a seven-pointed star and angled red RS, presumed to replace the earlier version. A website comment instead notes ordinary rather than rounded letters. The sequence is not conclusively established.

Aingeru Astui Zarraga identifies RS as Riva Suardíaz. Klaus-Michael Schneider’s February 2010 office sighting in Santa Cruz de Tenerife shows a white pennant edged red, with a red circle near the hoist and red RS following its perimeter. José Carlos Alegría relates the white-and-red design to Gijón’s maritime-province flag; this remains the contributor’s interpretation.

Port and starboard photographs of Gran Canaria Car in 2013 supply the funnel. A hull logo incorporates the same mark.