SINGAPORE -

* Bahrain's BAPCO offered 500,000 barrels of Banoco Arab Medium crude to load in February, the second month that the producer has offered prompt loading supplies, a tender document reviewed by Reuters showed on Friday

* Tender will close on Jan. 15, with bids valid until Jan. 17

* Last month, BAPCO sold a January-loading cargo via a tender at a discount wider than 80 cents to its OSP to Unipec CRU/M

(Reporting by Florence Tan; Editing by Kenneth Maxwell) ((Florence.Tan@thomsonreuters.com; +65 6870 3497; Reuters Messaging: florence.tan.thomsonreuters.com@reuters.net))