AMENDMENT No. 1 made as of this 1st day of August, 1997 (this
"AMENDMENT") to the AMENDED AND RESTATED SHIPBUILDING CONTRACT (the
"SHIPBUILDING CONTRACT") dated as of June 26, 1997 among Navigator Gas (IOM I-B)
Limited as assignee of Navigator Holdings PLC's rights, title and interest (the
"BUYER") and China Shipbuilding Trading Company, Limited and Jiangnan Shipyard
(collectively, as "SELLER") for construction of one (1) 22,000 Cubic Meters
Liquified Ethylene Gas Carrier (Hull No. 2246). Capitalized terms used and not
otherwise defined herein shall have the respective meanings set forth in the
SHIPBUILDING CONTRACT.

               WHEREAS, the BUYER and SELLER desire to amend certain terms and
schedules of the SHIPBUILDING CONTRACT to and in accordance with Section 7 of
Article XXI of the SHIPBUILDING CONTRACT for the purpose of correcting
provisions therein which have resulted from the increased cost of borrowing
incurred by the BUYER to finance the acquisition of the Vessel;

                           NOW, THEREFORE, in consideration of the foregoing,
BUYER and SELLER agree as follows:


1. Section 7(a) of Article II of the SHIPBUILDING CONTRACT is hereby deleted in
its entirety and is hereby amended to read as follows:

               "(a) All payments made by the BUYER hereunder in United States
Dollars and prior to Delivery and BUYER's acceptance of the VESSEL shall be in
the nature of installments to the SELLER. In the event that, the VESSEL is
rejected by the BUYER, or this Contract is canceled or terminated by the BUYER,
all in accordance with the terms of this Contract, or if the SELLER should
default in Delivery of the VESSEL or is guilty of breach of this Contract
justifying a rescission thereof by the BUYER then, and in any such event, the
SELLER shall refund to the BUYER an amount equal to the sum of the following:

                                    (i) the amounts set forth in Schedule 2
                           hereto calculated as of the first day of the calendar
                           month in which the Date of Rejection occurs,

                                    (ii) an amount equal to the product of (x)
                           the difference between (1) the amount set forth on
                           Schedule 2 hereto calculated as of the first day of
                           the calendar month immediately succeeding the month
                           in which the Date of Rejection occurs and (2) the
                           amount set forth on Schedule 2 hereto as of the first
                           day of the month in which the Date of Rejection
                           occurs and (y) a fraction the numerator of which is
                           the numeric day of the month of the Date of Rejection
                           and the denominator of which is 30, and

                                    (iii) the amount set forth on Schedule 3
                           hereto calculated as of the calendar month in which
                           the Date of Rejection occurs.





If the amount as calculated above is not paid on the Date of Rejection there
shall be added to such amount interest at the rate of eleven percent (11.0%) per
annum from and including the Date of Rejection to but not including the date
such amount is paid. Such refunds by the SELLER to the BUYER shall forthwith
discharge all obligations, duties, and liabilities of each of the parties hereto
to the other under this Contract. Any and all refunds made to the BUYER under
this Article II, Section 7 shall be made in United States Dollars. Throughout
this Contract, whenever interest is due on any amounts to be paid or refunded by
either party, said interest shall be calculated as simple interest, based on the
actual number of days divided by 360.

               For purposes of this Section 7(a) Date of Rejection means the
date on which written notice of rejection, cancellation or rescission is
delivered by BUYER to SELLER.

               All refunds made by the SELLER to the BUYER under this contract
shall be paid in United States Dollars by telegraphic transfer to the BUYER's
account or its assignee's account as set forth in a written notice to the SELLER
from such party."

               2. Section 1(a)(ii) of Article III of the SHIPBUILDING CONTRACT
is hereby deleted in its entirety and is hereby amended to read as follows:

                           "(ii) If the Delivery is not made on the Original
               Delivery Date (subject to a Permissible Delay as defined below),
               the SELLER shall pay the BUYER, as liquidated damages (not as
               penalty), the amount of $11,000 for each calendar day for the
               first ninety (90) calendar days of delay beyond the Extended
               Delivery Date (as hereinafter defined) and the amount of $14,500
               for each calendar day of delay thereafter up to and including the
               210th day from the Original Delivery Date ("Original Delay
               Period"). Liquidated damages calculated with respect to the
               Original Delay Period shall be recovered by the BUYER through a
               reduction in the Fifth Installment payable by the BUYER to the
               SELLER in an amount equal to such Liquidated Damages."

               3. Section 3(a) of Article XI of the SHIPBUILDING CONTRACT is
hereby deleted in its entirety and is hereby amended to read as follows:

               "(a) If the BUYER is in default of payment as to any installment
as provided in Paragraph 1 (a) and/or 1 (b) of this Article, the BUYER shall pay
interest on such installment at the rate of eleven percent (11.0%) per annum
until the date of the payment of the full amount, including all aforesaid
interest. In case the BUYER shall fail to take delivery of the VESSEL when
required to as provided in Section 1 (c) of this Article, the BUYER shall be
deemed in default of payment of the fifth installment and shall pay interest
thereon at the same rate as aforesaid from and including the day on which the
VESSEL is tendered for delivery by the SELLER, as provided in Article VII
Section 6 hereof."

               4. Schedule 2 of the SHIPBUILDING CONTRACT is hereby deleted in
its entirety and Schedule 2 attached hereto shall be attached as Schedule 2 to
the SHIPBUILDING CONTRACT.


                                        2


               5. Schedule 3 of the SHIPBUILDING CONTRACT is hereby deleted in
its entirety and Schedule 3 attached hereto shall be attached as Schedule 3 to
the SHIPBUILDING CONTRACT.


               6. Schedule 1 to Exhibit A of the SHIPBUILDING CONTRACT is hereby
deleted in its entirety and Schedule 1 to Exhibit A attached hereto shall be
attached as Schedule 1 to Exhibit A to the SHIPBUILDING CONTRACT.

               7. The parties hereto agree that the validity, enforcement and
interpretation of this AMENDMENT and of each Article and part hereof be governed
by and interpreted in accordance with the Laws of England.

               8. This AMENDMENT has been prepared in the English language,
which shall control. This AMENDMENT has been signed in triplicate, one
counterpart being retained by the BUILDER, one by CSTC and one by the BUYER.

               9. This AMENDMENT may be executed in any number of counterparts,
each of which counterparts shall be deemed to be an original, and such
counterparts shall constitute but one and the same instrument.


                                        3


               IN WITNESS WHEREOF, the parties hereto have caused this AMENDMENT
to be duly executed on the day and year first above written.

                                   NAVIGATOR GAS (IOM I-B) LIMITED


                                   By:  /s/ Joseph Avantario
                                      ---------------------------
                                   Name: Joseph Avantario
                                        -------------------------
                                   Title: Director
                                         ------------------------


                                   CHINA SHIPBUILDING TRADING
                                   COMPANY, LIMITED


                                   By:  /s/ Shen Yiping
                                      ---------------------------
                                   Name: Shen Yiping
                                        -------------------------
                                   Title: Vice President
                                         ------------------------


                                   JIANGNAN SHIPYARD


                                   By:  /s/ Gong Jingen
                                      ---------------------------
                                   Name: Gong Jingen
                                        -------------------------
                                   Title: Vice President
                                         ------------------------


                                        4


Navigator Gas Transport PLC                                        July 31, 1997

                SCHEDULE 1 - REFUNDMENT GUARANTEE - HULL NO. 2246


                  MONTH                      DATE                        AMOUNT
                    0.0                   07-Aug-97                   4,572,200
                    0.8                   01-Sep-97                   4,602,681
                    1.8                   01-Oct-97                   4,640,783
                    2.8                   01-Nov-97                   4,678,885
                    3.8                   01-Dec-97                   4,716,986
                    4.8                   01-Jan-98                   4,755,088
                    5.8                   01-Feb-98                   4,793,190
                    6.8                   01-Mar-98                   4,831,291
                    7.8                   01-Apr-98                   4,869,393
                    8.8                   01-May-98                   4,907,495
                    9.8                   01-Jun-98                   4,945,596
                   10.8                   01-Jul-98                  11,841,998
                   11.8                   01-Aug-98                  11,937,252
                   12.8                   01-Sep-98                  12,032,506
                   13.8                   01-Oct-98                  12,127,761
                   14.8                   01-Nov-98                  12,223,015
                   15.8                   01-Dec-98                  12,318,269
                   16.8                   01-Jan-99                  12,413,523
                   17.8                   01-Feb-99                  12,508,777
                   18.8                   01-Mar-99                  12,604,031
                   19.8                   01-Apr-99                  19,557,586
                   20.8                   01-May-99                  19,709,992
                   21.8                   01-Jun-99                  19,862,399
                   22.8                   01-Jul-99                  20,014,806
                   23.8                   01-Aug-99                  24,739,412
                   24.8                   01-Sep-99                  24,929,921
                   25.8                   01-Oct-99                  25,120,429
                   26.8                   01-Nov-99                  25,310,937
                   27.8                   01-Dec-99                  25,501,446
                   28.8                 01-Jan-2000                  25,691,954
                   29.8                 01-Feb-2000                  25,882,462
                   30.8                 01-Mar-2000                  26,072,971
                   31.8                 01-Apr-2000                  26,263,479
                   32.8                 01-May-2000                  26,453,987
                   33.8                 01-Jun-2000                  26,644,496
                   34.8                 01-Jul-2000                  26,757,004
                   35.8                 01-Aug-2000                  26,877,512
                   36.8                 01-Sep-2000                  26,996,021
                   37.8                 01-Oct-2000                  27,112,529
                   38.8                 01-Nov-2000                  27,227,037
                   39.8                 01-Dec-2000                  27,339,546
                   40.8                 01-Jan-2001                  27,420,054
                   41.8                 01-Feb-2001                  27,507,562
                   42.8                 01-Mar-2001                  27,593,071
                   43.8                 01-Apr-2001                  27,675,579


Cambridge Partners, L.L.C.                                                 FINAL




Navigator Gas Transport PLC                                        July 31, 1997

                SCHEDULE 2 - REFUNDMENT GUARANTEE - HULL NO. 2246


                  MONTH                      DATE                        AMOUNT
                    0.0                   07-Aug-97                   4,572,200
                    0.8                   01-Sep-97                   4,602,681
                    1.8                   01-Oct-97                   4,640,783
                    2.8                   01-Nov-97                   4,678,885
                    3.8                   01-Dec-97                   4,716,986
                    4.8                   01-Jan-98                   4,755,088
                    5.8                   01-Feb-98                   4,793,190
                    6.8                   01-Mar-98                   4,831,291
                    7.8                   01-Apr-98                   4,869,393
                    8.8                   01-May-98                   4,907,495
                    9.8                   01-Jun-98                   4,945,596
                   10.8                   01-Jul-98                  11,841,998
                   11.8                   01-Aug-98                  11,937,252
                   12.8                   01-Sep-98                  12,032,506
                   13.8                   01-Oct-98                  12,127,761
                   14.8                   01-Nov-98                  12,223,015
                   15.8                   01-Dec-98                  12,318,269
                   16.8                   01-Jan-99                  12,413,523
                   17.8                   01-Feb-99                  12,508,777
                   18.8                   01-Mar-99                  12,604,031
                   19.8                   01-Apr-99                  19,557,586
                   20.8                   01-May-99                  19,709,992
                   21.8                   01-Jun-99                  19,862,399
                   22.8                   01-Jul-99                  20,014,806
                   23.8                   01-Aug-99                  24,739,412
                   24.8                   01-Sep-99                  24,929,921
                   25.8                   01-Oct-99                  25,120,429
                   26.8                   01-Nov-99                  25,310,937
                   27.8                   01-Dec-99                  25,501,446
                   28.8                 01-Jan-2000                  25,691,954
                   29.8                 01-Feb-2000                  25,882,462
                   30.8                 01-Mar-2000                  26,072,971
                   31.8                 01-Apr-2000                  26,263,479
                   32.8                 01-May-2000                  26,453,987
                   33.8                 01-Jun-2000                  26,644,496
                   34.8                 01-Jul-2000                  26,757,004
                   35.8                 01-Aug-2000                  26,877,512
                   36.8                 01-Sep-2000                  26,996,021
                   37.8                 01-Oct-2000                  27,112,529
                   38.8                 01-Nov-2000                  27,227,037
                   39.8                 01-Dec-2000                  27,339,546
                   40.8                 01-Jan-2001                  27,420,054
                   41.8                 01-Feb-2001                  27,507,562
                   42.8                 01-Mar-2001                  27,593,071
                   43.8                 01-Apr-2001                  27,675,579


Cambridge Partners, L.L.C.                                                 FINAL




Navigator Gas Transport PLC                                        July 31, 1997

                  SCHEDULE 3 - PERFORMANCE BOND - HULL NO. 2246

                  MONTH                      DATE                        AMOUNT
                    0.0                      Aug-97                   1,829,659
                    0.8                      Sep-97                   4,513,787
                    1.8                      Oct-97                   4,730,972
                    2.8                      Nov-97                   4,965,925
                    3.8                      Dec-97                   5,179,198
                    4.8                      Jan-98                   5,419,179
                    5.8                      Feb-98                   5,682,838
                    6.8                      Mar-98                   5,888,364
                    7.8                      Apr-98                   6,130,079
                    8.8                      May-98                   6,351,120
                    9.8                      Jun-98                   6,589,701
                   10.8                      Jul-98                   6,777,094
                   11.8                      Aug-98                   7,003,405
                   12.8                      Sep-98                   7,236,253
                   13.8                      Oct-98                   7,452,039
                   14.8                      Nov-98                   7,682,302
                   15.8                      Dec-98                   7,895,308
                   16.8                      Jan-99                   8,133,779
                   17.8                      Feb-99                   8,393,362
                   18.8                      Mar-99                   8,606,941
                   19.8                      Apr-99                   8,798,724
                   20.8                      May-99                   9,007,537
                   21.8                      Jun-99                   9,227,864
                   22.8                      Jul-99                   9,450,835
                   23.8                      Aug-99                   9,646,393
                   24.8                      Sep-99                  10,026,826
                   25.8                      Oct-99                  10,419,142
                   26.8                     Nov-991                   6,062,777
                   27.8                      Dec-99                   6,245,665
                   28.8                    Jan-2000                   6,452,133
                   29.8                    Feb-2000                   6,668,220
                   30.8                    Mar-2000                   6,862,406
                   31.8                    Apr-2000                   7,071,513
                   32.8                    May-2000                   7,269,095
                   33.8                    Jun-2000                   7,554,455
                   34.8                    Jul-2000                   7,288,286
                   35.8                    Aug-2000                   7,025,566
                   36.8                    Sep-2000                   6,766,042
                   37.8                    Oct-2000                   6,494,266
                   38.8                    Nov-2000                   6,231,049
                   39.8                    Dec-2000                   5,985,003
                   40.8                    Jan-2001                   5,690,928
                   41.8                    Feb-2001                   5,410,168
                   42.8                    Mar-2001                   5,096,858
                   43.8                    Apr-2001                   4,488,458


Cambridge Partners, L.L.C.                                                 FINAL