Filipino captain Glenn Madoginog has revealed how he was held for months in Indonesia after being accused of illegally anchoring an International Seaways tanker.

The master of the 69,700-dwt Seaways Rubymar (built 2002) was jailed earlier this year after the shipowner refused to pay bribes to release him, Reuters reported.

The 47-year-old was one of dozens of captains held at the Batam naval base, accused of entering territorial waters without a permit while waiting to dock in Singapore.