...construction of the Vessel (hereinafter called "the Contract"), we, [name and address of issuer] (hereinafter called the "Guarantor"), the undersigned, do hereby irrevocably and unconditionally guarantee, as the primary obligor and not as a surety, ...

银行出具的还款保函“unconditionally"，将会被视“为见索即付”保函，多数银行是不会同意“unconditionally”。银行是作为“担保方”而非“债务方”出具还款保函。