"We are sensitive to those who have raised questions about the number of replacement units," he said, adding that current projects had higher requirements.

Below the hole, on the next shelf down, he had put replacement units for the hypospray charge.

Decisions need to be made soon, Army officials say, to identify potential replacement units or extensions.

Sometimes a replacement unit was welded onto the case of the original.

The replacement unit is now performing well, and prospects for 1993 look excellent.

Early tests indicated that the replacement unit was working as planned, mission officials said.

I've ordered a replacement unit, but the whole system's manufactured to spec in California.

But because it was only a replacement unit, Reno had no stockpiles of real weapons.

You have already exhausted all replacement units which I carried on board.

Unless we install a replacement unit, we'll lose three or four decks within a few hours.