There are many commonly accepted signals (keinuak) allowed in the game.

Shunting signals allow a train to move forward onto a line which may already be occupied.

The signalling is designed such that the controlling signals will only allow one train to enter the line.

The pulsar signal allows it to be 10 times more accurate than an atomic clock.

Twenty special signals allowed for reporting the movements of ships, to be made by privateers.

These signals, in turn, allow for the formation of embryonic tissues.

The signals allow pedestrians and road traffic to use the crossing alternately.

Digitally-coded signals sent along the power strips allow each car to respond only to its own controller.

This early signal allows the main computer to continue working even though the data has not actually been written yet.

Jamming such signals can allow participants in the war to use the stations for a misinformation campaign.