NOTICE OF GUARANTEED DELIVERY NAVIGATOR GAS TRANSPORT PLC for Tender of 12% Second Priority Ship Mortgage Notes due 2007 (including those in book-entry form) This form or a facsimile hereof must be used by a holder of the 12% Second Priority Ship Mortgage Notes due 2007 of Navigator Gas Transport PLC ("Navigator Gas Transport") (the "Old Second Priority Notes"), who wishes to tender Old Second Priority Notes to The Chase Manhattan Bank, as Second Priority Notes Exchange Agent (the "Second Priority Notes Exchange Agent"), pursuant to the guaranteed delivery procedures described in "The Exchange Offer-Guaranteed Delivery Procedures" of the Prospectus, dated _______, 199_ (the "Prospectus"), relating to the offer by Navigator Gas Transport to exchange Old Second Priority Notes for the 12% Second Priority Ship Mortgage Notes due 2007 that have been registered under the Securities Act of 1933, as amended, and in Instruction 2 to the related Letter of Transmittal. Any holder who wishes to tender Old Second Priority Notes pursuant to such guaranteed delivery procedures must ensure that the Second Priority Notes Exchange Agent receives this Notice of Guaranteed Delivery prior to 5:00 p.m., New York City time, on ___________, 199_, or such later date and time to which the Exchange Offer may be extended (the "Expiration Date"). This form, properly completed and executed, may be delivered by hand, mail or facsimile transmission to the Second Priority Notes Exchange Agent. In addition, in order to utilize the guaranteed delivery procedures to tender Old Second Priority Notes pursuant to the Exchange Offer, tender must be made through an Eligible Institution and a properly completed and duly executed Notice of Guaranteed Delivery must be received prior to the Expiration Date. Thereafter, a properly completed and executed Letter of Transmittal (or facsimile thereof) and certificate(s) representing all tendered Old Second Priority Notes (or a confirmation of book-entry transfer of such Old Second Priority Notes into the Second Priority Notes Exchange Agent's account at the Book-Entry Transfer Facility) and all other documents required by the Letter of Transmittal must be received by the Second Priority Notes Exchange Agent within five New York Stock Exchange trading days after the Expiration Date. Capitalized terms used and not defined herein shall have the meanings ascribed to such terms in the Prospectus or the Letter of Transmittal. BY REGISTERED OR CERTIFIED MAIL: BY HAND (UNTIL 4:30 PM., NEW YORK TIME): The Chase Manhattan Bank The Chase Manhattan Bank 55 Water Street 55 Water Street New York, NY 10041 New York, NY 10041 Attn: Carlos Esteves Attn: Carlos Esteves BY OVERNIGHT MAIL OR COURIER, OR BY HAND BY FACSIMILE (AFTER 4:30 P.M., NEW YORK TIME): (FOR ELIGIBLE INSTITUTIONS ONLY): The Chase Manhattan Bank 55 Water Street (212) 638-7380 New York, NY 10041 confirm by telephone (212) 638-0828 Attn: Carlos Esteves DELIVERY OF THIS INSTRUMENT TO AN ADDRESS OTHER THAN AS SET FORTH ABOVE OR TRANSMISSION OF INSTRUCTIONS VIA FACSIMILE TO A NUMBER OTHER THAN THE ONE LISTED ABOVE WILL NOT CONSTITUTE VALID DELIVERY. This form is not to be used to guarantee signatures. If a signature on a Letter of Transmittal is required to be guaranteed by an "Eligible Institution" under the instructions thereto, such signature guarantee must appear in the applicable space provided in the signature box on the Letter of Transmittal. GUARANTEE (Not to be used for signature guarantee) The undersigned, being a member of a registered national securities exchange or of the National Association of Securities Dealers, Inc., a commercial bank or trust company having an office or correspondent in the United States or an Eligible Guarantor Institution within the meaning of Rule 17 Ad-15 under the Securities Exchange Act of 1934, as amended, hereby guarantees that the undersigned will deliver to the Second Priority Notes Exchange Agent the certificates representing the Old Second Priority Notes being tendered hereby or confirmation of book-entry transfer of such Old Second Priority Notes into the Second Priority Notes Exchange Agent's account at The Depository Trust Company, in proper form for transfer, together with the Letter of Transmittal (or facsimile thereof) properly completed and duly executed, with any required signature guarantees and any other required documents, all within five New York Stock Exchange trading days after the Expiration Date. (Name of Firm) (Authorized Signature) (Name) (Title) (Address) (Zip Code) (Area Code and Telephone No.) Dated: _________________________ DO NOT SEND CERTIFICATES REPRESENTING OLD SECOND PRIORITY NOTES WITH THIS FORM. ACTUAL SURRENDER OF OLD SECOND PRIORITY NOTES MUST BE MADE PURSUANT TO, AND BE ACCOMPANIED BY, A COMPLETED AND EXECUTED LETTER OF TRANSMITTAL. Ladies and Gentlemen: The undersigned hereby tenders to Navigator Gas Transport, in accordance with Navigator Gas Transport's offer, upon the terms and subject to the conditions set forth in the Prospectus and the related Letter of Transmittal, receipt of which is hereby acknowledged, the principal amount of Old Second Priority Notes set forth below pursuant to the guaranteed delivery procedures described in the Prospectus and in Instruction 2 of the Letter of Transmittal. Name(s) of registered holder(s): (Please Type or Print) Address: Area Code and Telephone No.: Principal Amount of Old Second Priority Notes Tendered: Certificate Number(s) or Account Number(s) at Book-Entry Facility for Old Second Priority Notes (if available): Aggregate Principal Amount Represented by Old Note(s): All authority herein conferred or agreed to be conferred shall survive the death or incapacity of the undersigned and every obligation of the undersigned hereunder shall be binding upon the heirs, personal representatives, successors and assigns of the undersigned. Signature of Holder(s): Date: MUST BE SIGNED BY THE HOLDER(S) OF THE OLD SECOND PRIORITY NOTES AS THEIR NAME(S) APPEAR(S) ON CERTIFICATES OR BOOK-ENTRY ACCOUNTS FOR OLD SECOND PRIORITY NOTES OR ON A SECURITY POSITION LISTING, OR BY PERSON(S) AUTHORIZED TO BECOME REGISTERED HOLDER(S) BY ENDORSEMENT AND DOCUMENTS TRANSMITTED WITH THIS NOTICE OF GUARANTEED DELIVERY. IF SIGNATURE IS BY A TRUSTEE, EXECUTOR, ADMINISTRATOR, GUARDIAN, ATTORNEY-IN-FACT, OFFICER OR OTHER PERSON ACTING IN A FIDUCIARY OR REPRESENTATIVE CAPACITY, SUCH PERSON MUST SET HIS OR HER FULL TITLE BELOW. PLEASE PRINT NAME(S) AND ADDRESS(ES) Name(s): Capacity: Address(es):