Mark ignores retries and loss. I'm really far from confident this can be avoided, however perhaps with multiple terminals retransmitting... http://nrg.cs.ucl.ac.uk/mjh/starlink/hotnets19.pdf And it's still a bear to cross an ocean. -- Make Music, Not War Dave Täht CTO, TekLibre, LLC http://www.teklibre.com Tel: 1-831-435-0729