N_D
{ "Enterprise", specs+76, N_D,-10, 60, 7, 0 },
{ "Yorktown", specs+77, N_D, 0, 70, 7, 0 },
{ "Reliant", specs+78, N_D, 10, 70, 7, 0 },
{ "Galileo", specs+79, N_D, 20, 60, 7, 0 },
case N_D: return "d";