Thread:Hackey5/@comment-27362693-20160228085748/@comment-5645428-20160228130213

The ship's been around for long enough to know that S denotes it. The spider will only be in the latest levels so 'Sp' should suffice and be understandable.

Another possibility is a $, not a dollar sign but a struckthrough S to distinguish the spider form the ship, but that might just be more confusing. What do you think?