A COMBAT training exercise in the Sulawesi Sea in mid-December was a cause of concern for the navy. A submarine from an unidentified country slipped into Indonesian waters off the shore of North Sulawesi. The submarines shape was picked up on radarbut only for an instantthen it vanished from the screen.

In every single exercise, we definitely get shadowed by a submarine, said Navy Chief of Staff Slamet Soebijanto on board the warship Dalpelle, whi