PURPOSE: To enable free time control with various conditions by providing a memory circuit saving several patterns of a launching sequence at the time of launching a rocket, and a sequence pattern selector circuit.

CONSTITUTION: A memory circuit 21 storing several patterns of a launching sequence at the time of launching a rocket is provided, and a time generation part 25 is also provided for generating reference time for outputting each sequence pattern. In addition, the memory circuit 21 is connected to a selector control circuit 22 inputted with a select signal from an external signal input circuit 24. When a rocket or a flying body is launched, the sequence of the memory circuit 21-1 is used to control the flying body. Also, when an external activation signal is received with an altimeter, a ground command or the like, the sequence of the memory circuit 21-2 is used to control the flying body. Furthermore, when the flying body lands on a sea surface, the sequence of the memory circuit 21-3 is used to control the flying body.