[RTTY] 45.45-baud ASCII, 1000-Hz shift.

[Kok Chen]

Looks like raw 8 bit data packets (one or more silent symbols in between the data packets)

The start/stop bits are basically reduced to a "silence" bit or bits.  It really is not a binary sequence per se, but ternary (3k symbol, 1k symbol, silence symbol).

Even though it saves on frame sync, this is not going to work as well as a binary system when there is HF selective fading.

73
Chen, W7AY