I've been thinking of SUBSIM Merchant Navy, or Merchant Marine. Boring, yes, but fairly neutral and keeping with the theme around here.
In terms of organization, officially, I'd like to set it as casual. If the group really comes together we might take things a bit more seriously, organizing properly and directing our attention as a group, but I think it's more likely we'll end up as a group of freelancers under a common banner.
Something like this:
Just an example.
The activities you can pick from:
Figured trading and transport were close, but we could swap one out for exploring or freelancing for example.