

The sources disagree over the funnel variants’ use: Loughran assigns M337 to whalers and M336 to tankers, while Ships & The Sea assigns M336 to whalers. For M336, some illustrations make the diamond extend across the band; the Polarsol photograph appears to keep its horizontal extent within the band, agreeing with Stewart, although the vertical alignment is unclear. Jordan does not specify band position, and the flag diamond’s size also varies.