JOHANNESBURG, South Africa (Reuters) - Armed South African officials were hoping Wednesday for another attempt to board a Uruguayan ship chased for 20 days through Antarctic seas on suspicion it has been poaching the rare Patagonian Toothfish, also known as Chilean sea bass. A South African salvage tug, the John Ross, came alongside the Uruguayan-flagged Viarsa late Tuesday, but waves of up to 33 feet and heavy snow prevented a boarding, according to Australian and South African officials. "We think it might happen (the boarding) at around 1600 our time (10 a.m. EDT) but we will see what happens. The...