(b) Multiple Vessels and Types of Security.— The security interest may relate to more than one vessel and may consist of more than one type of security. If the security interest relates to more than one vessel, the obligation may have the latest maturity date allowable under section
53710 (a)(3) of this title for any of the vessels used as security for the guarantee. However, the Secretary may require such payments of principal prior to maturity, with respect to all related obligations, as the Secretary considers necessary to maintain adequate security for the guarantee.
