No Guarantor will (a) make any modification or repairs to, or replacement of, the Vessel owned by it or equipment installed on that Vessel which would or is reasonably likely to materially alter the structure, type or performance characteristics of that Vessel or materially reduce its value; or (b) remove any material part of the Vessel owned by it, or any item of equipment installed on, that Vessel unless the part or item so removed is forthwith replaced by a suitable part or item which is in the same condition as or better condition than the part or item removed, is free from any security interest or any right in favor of any person other than the Security Trustee and becomes on installation on that Vessel, the property of that Guarantor and subject to the security constituted by the Vessel Mortgage, provided that a Guarantor may install and remove equipment owned by a third party if the equipment can be removed without any risk of damage to the Vessel owned by it.