Signal
void Signal(const char *, struct ship *, ...) __printflike(1,3);
Signal("$$ within range of %s broadside.",
Signal("$$ %s %s %s.",
Signal("$$: %s", ship, astr);
Signal("\a$$: %s", ship, astr);
case Signal:
{ { Signal, 0 }, { Ptr | IN, 1 }, { Ptr | OUT, 2 }}},