“(OWI) June 16 – APO 920 – Moved from Biak to neighboring island of Owi, reason was that planes couldn’t operate from Biak, engineers built strip on Owi in five days. Could hear artillery booming all night long. Japs dug in caves. Owi is a very small island, about 2 1/2 miles long and a mile wide but is a nice place. While at Biak we thought we’ed be attacked by Japs, were on alert all night. Dug my first slit trench.” Alright so “OWI” is an island right near Biak island, formally known as Pulau Owi Island. Like mentioned in the journal an air strip was built there, the reason being to give the Army Air Force a better place to operate from. It was built under General MacArthur’s command. A “slit trench” also known as an individual prone shelter, is just what it sounds like, a small, narrow slit dug into the ground. Typically big enough for one soldier to lay inside to protect themselves form any fire and fragments from explosions (although sometimes they are made bigger to accommodate more soldiers).
Here is an illustration of what a slit trench looks like:
* Please note that we do not own this image, here is the source for it: https://www.ibiblio.org/hyperwar/USA/ref/FM/FM7-10/FM7-10-I.html *
If you would like to find out more information about Owi island and the airfield there, you can go to these websites: http://www.pacificwrecks.com/airfields/indonesia/owi/index.html ,