Sealink only used the back to front symbol on the starboard side of their ships - it is a common practice (although not universal) to use a reversed symbol on that side of a ship so it represents a flag as seen flying sternwards from a mast, (i.e seen from the reverse side) even though the symbol is actually painted on. Some military shoulder insignia follow the same pattern (e.g the US army), as did the earlier version of the British railways "Lion and Wheel" symbol, which had two versions, to be placed on opposite sides of steam locomotives so that the lion always faced forwards.