shuttle loading

15 LETTERS · STARTS WITH S

shuttle loading is a valid 15-letter word worth 19 points in Scrabble and 23 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

S1H4U1T1T1L1E1L1O1A1D2I1N1G2

1 + 4 + 1 + 1 + 1 + 1 + 1 + 0 + 1 + 1 + 1 + 2 + 1 + 1 + 2 =19 PTS

DOUBLE WORD → 38TRIPLE WORD → 57

MEANING

What does shuttle loading mean?