sparecommand
nounUK /ˌspeəˈkəˈmɑːnd/
US /ˌsper kəˈmænd/
A spare command is an extra order you keep ready in case you need it.
The captain kept a sparecommand in case the first plan failed.
RELATED WORDS
OTHER MEANINGS
2. A second command given when the first one does not work.
When the robot ignored the first signal, the engineer sent a sparecommand.
3. An unused control kept for emergencies.
The pilot had a sparecommand ready in case the autopilot stopped.
4. A duplicate order stored for later use.
The team saved a sparecommand in the system for the next launch.