(a) For further guidance you may obtain the following:

(1) IEC 61174—The International Electrotechnical Commission identified and described the necessary performance tests and checks for an International Maritime Organization (IMO) compliant ECDIS. The IMO Performance Standards permit National Maritime Safety Administrations to consider ECDIS as the functional equivalent to charts required by Regulation V, Chapter 20 of the 1974 SOLAS Convention. IEC Publication 61174, dated August 1998, can be purchased from the IEC Web site: http://www.iec.ch.

(2) IHO Special Publication S57—The IHO Transfer Standard for Hydrographic Data, edition 3.1, dated November 2000, describes the data structure and format to be used for the exchange of ENC data, product specification for the production of ENC data, and an updating profile. IHO S-57 documentation is available for free download at http://www.iho.shom.fr. Send written requests to the International Hydrographic Bureau, 4 quai Antoine 1er, B.P. 445, MC 98011 MONACO CEDEX; telephone: (377) 93.10.81.00; e-mail: info@ihb.mc.

(3) IHO Special Publication S58—The IHO Validation Checks for Hydrographic Data, edition 2.0, dated October 2003, describes the validation checks to be used on ENC data. This document was formally published as S-57 Appendix B.1, Annex C, but has been renamed to S-58 due to the S-57 publication having been frozen (i.e. will not change) for a fixed time period. IHO S-58 documentation is available for free download at http://www.iho.shom.fr. Send written requests to the International Hydrographic Bureau, 4 quai Antoine 1er, B.P. 445, MC 98011 MONACO CEDEX; telephone: (377) 93.10.81.00; e-mail: info@ihb.mc.

(b) [Reserved]