POWER OF ATTORNEY

Know all by these presents, that the undersigned hereby constitutes and appoints
each of Bruce J. Byrnes and Emily B. Miner, signing singly, the undersigned's
true and lawful attorney-in-fact to:

     (1) execute for and on behalf of the undersigned, in the undersigned's
         capacity as an officer and/or director of The Navigators Group, Inc.
         (the "Company"), Forms 3, 4 and 5 (including amendments thereto) in
         accordance with Section 16(a) of the Securities Exchange Act of 1934
         and the rules and regulations thereunder;

     (2) do and perform any and all acts for and on behalf of the undersigned
         which may be necessary or desirable to complete and execute any such
         Forms 3, 4 or 5, and timely file such forms (including amendments
         thereto) with the United States Securities and Exchange Commission and
         any stock exchange or similar authority; and

     (3) take any other action of any type whatsoever in connection with the
         foregoing which, in the opinion of such attorney-in-fact, may be of
         benefit to, in the best interest of, or legally required by, the
         undersigned, it being understood that the documents executed by such
         attorney-in-fact on behalf of the undersigned pursuant to this Power of
         Attorney shall be in such form and shall contain such terms and
         conditions as such attorney-in-fact may approve in such attorney-in-
         fact's discretion.

The undersigned hereby grants to each such attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary or proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned might or
could do if personally present, with full power of substitution or revocation,
hereby ratifying and confirming all that such attorney-in-fact, or such
attorney-in-fact's substitute or substitutes, shall lawfully do or cause to be
done by virtue of this power of attorney and the rights and powers herein
granted. The undersigned acknowledges that the foregoing attorneys-in-fact, in
serving in such capacity at the request of the undersigned, are not assuming,
nor is the Company assuming, any of the undersigned's responsibilities to comply
with Section 16 of the Securities Exchange Act of 1934.

The undersigned shall be provided with the opportunity to review and approve in
advance any documents to be signed by an attorney-in-fact hereunder; however,
the undersigned agrees that each such attorney-in-fact may rely entirely on
information furnished orally or in writing by the undersigned to such
attorney-in-fact in taking such action.

This Power of Attorney supersedes any power of attorney previously executed by
the undersigned regarding the purposes outlined in the first paragraph hereof
("Prior Powers of Attorney"), and the authority of the attorneys-in-fact named
in any Prior Powers of Attorney is hereby revoked.

This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file Forms 3, 4 or 5 with respect to the
undersigned's holdings of and transactions in securities issued by the Company,
unless earlier revoked by the undersigned in a signed writing delivered to the
foregoing attorneys-in-fact or otherwise revoked in a manner as provided below.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of this 31st day of May 2013.


                                        By:     /s/David M. Platter
                                                --------------------------------
                                        Name:   David M. Platter