I totally understand the answer given in the back of the book...however silly me didnt realise that there was 15degs separation in the longitude, i worked it out using the conversions, anyway the answer i get is different...i just cant seem to pinpoint where this error occured, obviously its there just cant see it

BOD A 0500LMT, E 131, E 131 is 8hrs 44

? 05 00

- ? 08 44

i got ?2016UTC

BOD B 1830LMT, E 146, E 146 is 9hrs 44 (i can see the 1hour difference in the longitudes)

? 18 30

- ? 9 44

i got ?0846UTC

Which brings me to my answer

? 20 16

- ? 08 46

Which gives me the 11hrs 30minutes...

Can anyone work out what ive done wrong, for about the 5th time i still cant see it