h. 20% of the Contract price for Training Ship mentioned in the contract, shall be payable upon delivery of the ship (on completion of satisfactory Installation, SAT, Test and Trial of ship including all equipment/machinery, Helo Landing trial and Acceptance by BN Acceptance Team). The amount will be released against presentation by the Shipbuilder of the 4 (four) copies of the Shipbuilder’s Commercial Invoice together with a copy of the Protocol of Delivery and Final Acceptance of the Vessel by the Purchaser and clearance from DGDP.