1978 Canada stamps ice vessels

Those thin lines for ropes and such are engraved whereas the rest of the ship is printed with lithography, so they're separate parts of the printing process. If the engraving is poorly aligned, the ropes will miss lining up properly with the ship. Unless they miss by a lot (for example, part of the ropes end up on the next stamp beside it), it's considered pretty much the same as a poorly centred stamp and is not something of extra value. The Unitrade catalogue used to list various minor colour shifts but there was a decision made years ago to remove them and for the most part, they've all disappeared from the listings - I think maybe the Welland Canal issue (?) still mentions "hair touching the barn" but that's the only one I remember seeing in catalogues from recent years (maybe the Siamese Bears 25c landscape definitive from the '70s is still there too?). The Darnell catalogue listed all kinds of these colour shifts.

Ryan