| �ӴѺ��� | �.�.�. | ͧ��� | �����Ţ | ����ͧ | ACTION | ��ô��Թ��âͧ ��. | |
| 60. | 08/11/18 | IHO | CIRCULAR LETTER 53/2018 | REVISION OF THE TERMS OF REFERENCE AND RULES OF PROCEDURE OF THE HYDROGRAPHIC SERVICES AND STANDARDS COMMITTEE (HSSC) AND THE INTER-REGIONAL COORDINATION COMMITTEE (IRCC) | VOTE | ���������ҧ���Թ��� | |
| �ӴѺ��� | �.�.�. | ͧ��� | �����Ţ | ����ͧ | ACTION | ��ô��Թ��âͧ ��. | |
| 59. | 29/10/18 | IHO | CIRCULAR LETTER 51/2018 | OUTCOME OF THE 2nd MEETING OF THE IHO COUNCIL | �����ͷ�Һ | �Ѻ��Һ | |
| 58. | 15/10/18 | IHO | CIRCULAR LETTER 50/2018 | CALL FOR APPROVAL OF EDITION 4.0.0 OF IHO PUBLICATION S-100 UNIVERSAL HYDROGRAPHIC DATA MODEL | VOTE | ���������ҧ���Թ��� | |
| 57. | 04/10/18 | IHO | CIRCULAR LETTER 49/2018 | ADOPTION OF EDITION 4.8.0 OF IHO PUBLICATION S-4-CHART SPECIFICATIONS OF THE IHO | �����ͷ�Һ | �Ѻ��Һ | |
| 56. | 04/10/18 | IHO | CIRCULAR LETTER 48/2018 | MASTER OF SCIENCE PROGRAMME IN HYDROGRAPHIC SURVEYING AT THE UNIVERSITY OF SOUTHERN MISSISSIPPI (USA)SPONSORED BY THE REPUBLIC OF KOREA | �����ͷ�Һ | �Ѻ��Һ | |
| 55. | 03/10/18 | IHO | CIRCULAR LETTER 47/2018 | ADOPTION OF EDITION 6.1.0 OF IHO PUBLICATION S-58 ENC VALIDATION CHECKS | �����ͷ�Һ | �Ѻ��Һ | |
| �ӴѺ��� | �.�.�. | ͧ��� | �����Ţ | ����ͧ | ACTION | ��ô��Թ��âͧ ��. | |
| 54. | 24/09/18 | IHO | CIRCULAR LETTER 46/2018 | ADOPTION OF REVISIONS TO IHO RESOLUTIONS 7/2009, 9/1932, 4/1982 AND DELETION OF IHO RESOLUTIONS 4/1937 AND 9/1962 | �����ͷ�Һ | �Ѻ��Һ | |
| 53. | 19/09/18 | IHO | CIRCULAR LETTER 45/2018 | CALL FOR APPROVAL OF EDITION 1.0.0 OF IHO PRODUCT SPECIFICATIONS S-122 - Marine Protected Areas and S-123 � Radio Services | VOTE | ���Թ������� | |
| 52. | 07/09/18 | IHO | CIRCULAR LETTER 44/2018 | OUTCOME OF THE TENTH MEETING OF THE INTER-REGIONAL COORDINATION COMMITTEE (IRCC10) | �����ͷ�Һ | �Ѻ��Һ | |
| 51. | 07/09/18 | EAHC | CIRCULAR LETTER 13/2018 | LIST OF DELEGATES AND 2ND DRAFT AGENDA FOR THE 13TH EAST ASIA HYDROGRPHIC COMMISSION CONFERENCE, 18-20 SEPTEMBER 2018 | �����ͷ�Һ | �Ѻ��Һ (��ҹ) Annex A/ Annex B |
|
| �ӴѺ��� | �.�.�. | ͧ��� | �����Ţ | ����ͧ | ACTION | ��ô��Թ��âͧ ��. | |
| 50. | 30/08/18 | EAHC | CIRCULAR LETTER 12/2018 | INVITATION TO THE CARTO PRODUCTION DATABASE SYSTEM DEVELOPMENT,22-26 OCTOBER, SHANGHAI,CHINA | �����ͷ�Һ | �Ѻ��Һ (��ҹ) Annex A |
|
| 49. | 06/08/18 | EAHC | CIRCULAR LETTER 11/2018 | LOGISTIC DETAILS AND ACCOMMODATION FOR THE 13TH EAST ASIA HYDROGRAPHIC COMMISSION (EAHC) AND HYDROGRAPHY SOUTH EAST ASIA (HYDROSEA)CONFERENCE&EXHIVITION 2018 IN PUTRAJAYA, MALAYSIA | �����ͷ�Һ | �Ѻ��Һ | |
| 48. | 01/08/18 | EAHC | CIRCULAR LETTER 10/2018 | INVITATION FOR THE 13TH EAHC CONFERENCE MEETING | �����ͷ�Һ | �Ѻ��Һ | |
| 47. | 01/08/18 | EAHC | CIRCULAR LETTER 9/2018 | INVITATION FOR THE 13TH EAHC CONFERENCE MEETING | �����ͷ�Һ | �Ѻ��Һ | |
| �ӴѺ��� | �.�.�. | ͧ��� | �����Ţ | ����ͧ | ACTION | ��ô��Թ��âͧ ��. | |
| 46. | 26/07/18 | IHO | CIRCULAR LETTER 43/2018 | FORMER DIRECTOR KENNETH �KEN� BARBOR | �����ͷ�Һ | �Ѻ��Һ | |
| 45. | 16/07/18 | IHO | CIRCULAR LETTER 42/2018 | FIG/IHO/ICA INTERNATIONAL BOARD ON STANDARDS OF COMPETENCE FOR HYDROGRAPHIC SURVEYORS AND NAUTICAL CARTOGRAPHERS (IBSC) - IHO NOMINATION | �����ͷ�Һ | �Ѻ��Һ | |
| 44. | 16/07/18 | IHO | CIRCULAR LETTER 41/2018 | PUBLICATION OF THE ANNUAL REPORT OF THE IHO FOR 2017 | �����ͷ�Һ | �Ѻ��Һ | |
| 43. | 07/07/18 | IHO | CIRCULAR LETTER 40/2018 | CALL FOR APPROVAL OF EDITION 4.8.0 OF IHO PUBLICATION S-4 - CHART SPECIFICATIONS OF THE IHO | VOTE | ���Թ������� | |
| 42. | 05/07/18 | IHO | CIRCULAR LETTER 39/2018 | CALL FOR APPROVAL OF REVISIONS TO IHO RESOLUTIONS 7/2009, 9/1932, 4/1982 AND FOR THE DELETION OF IHO RESOLUTIONS 4/1937 AND 9/1962 | VOTE | ���Թ������� | |
| 41. | 03/07/18 | EAHC | CIRCULAR LETTER 8/2018 | SUBMISSION OF PROPOSAL FOR THE 2ND MEETING OF THE IHO COUNCIL | �����ͷ�Һ | �Ѻ��Һ | |
| 40. | 02/07/18 | EAHC | CIRCULAR LETTER 7/2018 | INVITATION TO THE 13TH EAHC CONFERENCE | �����ͷ�Һ | �Ѻ��Һ | |
| 39. | 02/07/18 | EAHC | CIRCULAR LETTER 6/2018 | INVITATION TO THE 13TH EAST ASIA HYDROGRAPHIC COMMINSSION (EAHC) AND HYDROGRAPHIC CONFERRENCE AND SOUTH EAST ASIA (HYDROSEA) CONFERRENCE&EXHIBITION 2018 | �����ͷ�Һ | �Ѻ��Һ | |
| �ӴѺ��� | �.�.�. | ͧ��� | �����Ţ | ����ͧ | ACTION | ��ô��Թ��âͧ ��. | |
| 38. | 28/06/18 | IHO | CIRCULAR LETTER 38/2018 | APPROVAL OF EDITION 6.1.0 OF IHO PUBLICATION S-58 ENC VALIDATION CHECKS | VOTE | ���Թ������� | |
| 37. | 27/06/18 | IHO | CIRCULAR LETTER 37/2018 | SYRIAN ARAB REPUBLIC - SUSPENSION OF RIGHTS OF MEMBERSHIP OF THE IHO | �����ͷ�Һ | �Ѻ��Һ | |
| 36. | 18/06/18 | IHO | CIRCULAR LETTER 36/2018 | IMPLEMENTATION OF THE IHO WORK PROGRAMME AND REQUEST FOR MEMBER STATES TO CONSIDER HOSTING MEETINGS | �����ͷ�Һ | �Ѻ��Һ | |
| 35. | 14/06/18 | IHO | CIRCULAR LETTER 35/2018 | OUTCOME OF THE TENTH MEETING OF THE HYDROGRAPHIC SERVICES AND STANDARDS COMMITTEE (HSSC) | �����ͷ�Һ | �Ѻ��Һ | |
| 34. | 11/06/18 | IHO | CIRCULAR LETTER 34/2018 | REPORT ON THE 99th SESSION OF THE IMO MARITIME SAFETY COMMITTEE(MSC 99) | �����ͷ�Һ | �Ѻ��Һ | |
| �ӴѺ��� | �.�.�. | ͧ��� | �����Ţ | ����ͧ | ACTION | ��ô��Թ��âͧ ��. | |
| 33. | 30/05/18 | IHO | CIRCULAR LETTER 33/2018 | NEW IHO MEMBER STATE - REPUBLIC OF BULGARIA | �����ͷ�Һ | �Ѻ��Һ | |
| 32. | 22/05/18 | IHO | CIRCULAR LETTER 32/2018 | ACTIVITIES FOR CENTENARY CELEBRATIONS OF THE IHO (IHO-100) | �����ͷ�Һ | �Ѻ��Һ | |
| 31. | 18/05/18 | IHO | CIRCULAR LETTER 31/2018 | HYDROGRAPHIC SURVEY PROGRAMME (FIG/IHO/ICA Category "B")SPONSORED BY THE REPUBLIC OF KOREA | �����ͷ�Һ | �Ѻ��Һ | |
| �ӴѺ��� | �.�.�. | ͧ��� | �����Ţ | ����ͧ | ACTION | ��ô��Թ��âͧ ��. | |
| 30. | 24/04/18 | IHO | CIRCULAR LETTER 30/2018 | CANCELLATION OF THE IMPLEMENTATION DATE FOR EDITION 6.0.0 OF THE IHO PUBLICATION S-58 � ENC VALIDATION CHECKS | �����ͷ�Һ | �Ѻ��Һ | |
| 29. | 18/04/18 | IHO | CIRCULAR LETTER 29/2018 | GEBCO SUB-COMMITTEE ON UNDERSEA FEATURE NAMES (SCUFN)- APPOINTMENT OF NEW MEMBERS | �����ͷ�Һ | �Ѻ��Һ | |
| 28. | 18/04/18 | IHO | CIRCULAR LETTER 28/2018 | IHO-IOC GEBCO GUIDING COMMITTEE (GGC)NEW IHO REPRESENTATIVE | �����ͷ�Һ | �Ѻ��Һ | |
| 27. | 12/04/18 | IHO | CIRCULAR LETTER 27/2018 | IHO - NIPPON FOUNDATION CHART PROJECT�Successful Candidates for the 10th Course (03 September � 14 December 2018) | �����ͷ�Һ | �Ѻ��Һ | |
| 26. | 05/04/18 | IHO | CIRCULAR LETTER 26/2018 | ADOPTION OF A NEW IHO RESOLUTION ON THE PROCEDURE FOR CONSIDERING | �����ͷ�Һ | �Ѻ��Һ | |
| �ӴѺ��� | �.�.�. | ͧ��� | �����Ţ | ����ͧ | ACTION | ��ô��Թ��âͧ ��. | |
| 25. | 12/03/18 | IHO | CIRCULAR LETTER 25/2018 | REPORT ON THE FIFTH SESSION OF THE IMO SUB-COMMITTEE | �����ͷ�Һ | �Ѻ��Һ | |
| 24. | 07/03/18 | IHO | CIRCULAR LETTER 24/2018 | MASTER OF SCIENCE PROGRAMME IN HYDROGRPAHIC SURVEYING | �����ͷ�Һ | �Ѻ��Һ | |
| 23. | 06/03/18 | IHO | CIRCULAR LETTER 23/2018 | FIG/IHO INTERNATIONAL BOARD ON STANDARDS OF COMPETENCE FOR HYDROGRAPHIC SURVEYORS | �����ͷ�Һ | �Ѻ��Һ | |
| 22. | 05/03/18 | IHO | CIRCULAR LETTER 22/2018 | HYDROGRAPHIC SURVEY PROGRAMME (FIG-IHO-ICA Category B) | �����ͷ�Һ | �Ѻ��Һ | |
| �ӴѺ��� | �.�.�. | ͧ��� | �����Ţ | ����ͧ | ACTION | ��ô��Թ��âͧ ��. | |
| 21. | 23/02/18 | IHO | CIRCULAR LETTER 21/2018 | ADOPTION OF SERVISIONS OF IHO RESOLUTINS 5/1975,1/1969,9/1967,5/1972,1/2014,4/1957,8/1967 | �����ͷ�Һ | �Ѻ��Һ | |
| 20. | 15/02/18 | IHO | CIRCULAR LETTER 20/2018 | ADOPTION OF THE TERMS OF REFERENCE AND RULES OF PROCEDURE OF THE STRATEGIC PLAN REVIEW WORKING GROUP AND MEMBERSHIP | �����ͷ�Һ | �Ѻ��Һ | |
| 19. | 15/02/18 | IHO | CIRCULAR LETTER 19/2018 | APPROVAL OF THE WITHDRAWAL OF IHO PUBLICATION B-7 - GEBCO GUIDELINES | �����ͷ�Һ | �Ѻ��Һ | |
| 18. | 14/02/18 | IHO | CIRCULAR LETTER 18/2018 | APPROVAL OF THE WITHDRAWAL OF IHO PUBLICATION B-7 - GEBCO GUIDELINES | �����ͷ�Һ | �Ѻ��Һ | |
| 17. | 14/02/18 | IHO | CIRCULAR LETTER 17/2018 | IHO-IOC-NIPON FOUNDATION - GEBGO TRAINING PROGRAMME | �����ͷ�Һ | �Ѻ��Һ | |
| 16. | 13/02/18 | IHO | CIRCULAR LETTER 16/2018 | ADOPTION OF EDITION 2.0.0 OF THE IHO PUBLICATION C-17-SPATIAL DATA INFRASTRUTURES | �����ͷ�Һ | �Ѻ��Һ | |
| 15. | 08/02/18 | IHO | CIRCULAR LETTER 15/2018 | CONTINUATION OF THE ADOPTION PROCESS OF HSSC AND IRCC RECOMMENDATIONS | �����ͷ�Һ | �Ѻ��Һ | |
| 14. | 06/02/18 | IHO | CIRCULAR LETTER 14/2018 | PROJECT BASED SUPPORT OPPORIUNITIES IN THE IHO SECRETARIAT | �����ͷ�Һ | �Ѻ��Һ | |
| 13. | 02/02/18 | IHO | CIRCULAR LETTER 13/2018 | ADOPTION OF REVISION 4.1.0 OF IHO PUBLICATION S-57 APPENDIX B.1, ANNEX A | �����ͷ�Һ | �Ѻ��Һ | |
| 12. | 02/02/18 | IHO | CIRCULAR LETTER 12/2018 | ADOPTION OF REVISION 1.1.0 OF IHO PUBLICATION S-56 | �����ͷ�Һ | �Ѻ��Һ | |
| 11. | 02/02/18 | IHO | CIRCULAR LETTER 11/2018 | ADOPTION OF REVISION 3.1.0 OF IHO PUBLICATION S-11 PART A | �����ͷ�Һ | �Ѻ��Һ | |
| �ӴѺ��� | �.�.�. | ͧ��� | �����Ţ | ����ͧ | ACTION | ��ô��Թ��âͧ ��. | |
| 10. | 31/01/18 | IHO | CIRCULAR LETTER 10/2018 | SIXTEEN MEETING OF THE CAPACITY BUILDING SUB-COMMITTEE (CBSC16) | �����ͷ�Һ | �Ѻ��Һ | |
| 9. | 29/01/18 | IHO | CIRCULAR LETTER 09/2018 | NEW IHO MEMBER STATE - REPUBLIC OF SEYCHELLES | �����ͷ�Һ | �Ѻ��Һ | |
| 8. | 29/01/18 | IHO | CIRCULAR LETTER 08/2018 | REMITTANCE OF ANNUAL CONTRIBUTIONS | �����ͷ�Һ | �Ѻ��Һ | |
| 7. | 29/01/18 | IHO | CIRCULAR LETTER 07/2018 | AVAILABILITY OF A NEW INFORMATIVE VIDEO ON HYDROGRAPHY | �����ͷ�Һ | �Ѻ��Һ | |
| 6. | 19/01/18 | IHO | CIRCULAR LETTER 06/2018 | REINSTATEMENT OF DOMINICAN REPUBLIC | �����ͷ�Һ | �Ѻ��Һ | |
| 5. | 18/01/18 | IHO | CIRCULAR LETTER 05/2018 | PREPARATION FOR THE 5TH SESSION OF THE IMO SUB-COMMITTEE ON NAVIGATION | �����ͷ�Һ | �Ѻ��Һ | |
| 4. | 17/01/18 | IHO | CIRCULAR LETTER 04/2018 | IHO - NIPPON FOUNDATION CHART PROJECT | �����ͷ�Һ | �Ѻ��Һ | |
| 3. | 11/01/18 | IHO | CIRCULAR LETTER 03/2018 | THENE FOR WORLD HYDROGRAPHY DAY 2018 | �����ͷ�Һ | �Ѻ��Һ | |
| 2. | 09/01/18 | IHO | CIRCULAR LETTER 02/2018 | CALL FOR APPROVAL OF A NEW IHO RESOLUTION | VOTE | ���Թ������� | |
| 1. | 09/01/18 | IHO | CIRCULAR LETTER 01/2018 | NATIONAL EXPERTS ON THE LAW OF THE SEA | �����ͷ�Һ | �Ѻ��Һ | |