Translumic

Ranald Porteous, chief test pilot of Auster Aircraft, Ltd. […] in his company’s house journal[:] “[…] A further difficulty, due to the Soviet veto on discussions dealing with the Interplanetary Date Line, is that pilots carrying out tests at translumic speeds have often found themselves back at their base before they have started.”

A thought provoking book, even if it seems a little premature to trouble about translumic speeds and the need to avoid collisions with self-illuminating stars and dark objects in stellar space.

The avoidance of collisions by manned vehicles moving at these 'translumic' speeds presents a formidable problem.