Jet lost for hours over Java after navigation system failed

[Horas]

Standby Magnetic Compas? RMI / ADF / VOR /DME?The number 3 emergency battery operated emergency VHF I think they should have one of those in a B737-300? The HF , weather radar map mode?
How about "Eye balls mark 1" and have a good look out of the window for some good old fashioned map reading, and at 06:30 Hrs at FL 310 or higher the sun should also give a fair idea of which way you are going, the average heading from Jakarta to Destination Makassar is about 085? Apparently the aircraft was in the air for about 4 hours for what should have been a two hour flight.Not a word to the 140 passengers all that time even thoug they noticed the aircraft climbing /descending climbing again circling etc?