By authority of The Governor of The Panama Canal some of the duties of the Branch Hydrographic Offices are performed by the Captain of the Port at Cristobal and the Captain of the Port at Balboa. Reference charts and sailing directions may be consulted at these offices, and shipmasters may receive the Pilot Charts, Notice to Mariners, and Hydrographic Bulletin in return for marine and meteorological data reports. Observers’ blanks and comparisons of navigational instruments may be obtained at the same time. Neither of these offices maintains a regular mailing list for the distribution of publications; such mailing lists are maintained at the Branch Hydrographic Offices along the United States coasts (see addresses elsewhere on the chart) and at the main office, Washington, for the benefit of those shipmasters and officers who contribute data regularly.
Sale of Hydrographic Office Publications.—The Captain of the Port of Cristobal, Canal Zone, is an agent for the sale of Hydrographic Office publications. Applications should be made to the Captain of the Port at Cristobal or at Balboa.
16 BRANCH HYDROGRAPHIC OFFICE ADDRESSES
| Boston, Mass. | 14th Floor, Customhouse |
| New York, N. Y. | Rooms 301–302, Maritime Exchange, 78–80 Broad St. |
| Philadelphia, Pa. | Main Floor, The Bourse Building |
| Baltimore, Md. | Room 123, Customhouse |
| Norfolk, Va. | Room 16, Customhouse |
| Savannah, Ga. | First Floor, Customhouse |
| New Orleans, La. | Room 215, Customhouse |
| Galveston, Tex. | Room 301, Customhouse |
| San Juan, P. R. | Federal Building |
| San Pedro, Calif. | Immigration Building, San Pedro |
| San Francisco, Calif. | Merchants’ Exchange |
| Portland, Oreg. | Room 407, Customhouse |
| Seattle, Wash. | Room 408, Lowman Building |
| Duluth, Minn. | Room 1000, Torrey Building |
| Sault Sainte Marie, Mich. | Room 10, Federal Building |
| Chicago, Ill. | Room 481, Post Office Building |
| Detroit, Mich. | 7450 East Jefferson Ave. |
| Cleveland, Ohio | Rooms 406–408, Federal Building |
| Buffalo, N. Y. | Room 345, Post Office Building |
HYDROGRAPHIC INFORMATION OFFICE | |
| Honolulu, T. H. | Room 219, Federal Building |
17 EQUATOR CROSSINGS FOR SAILING PASSAGES IN THE PACIFIC OCEAN.
This table gives the data for ships north bound in the Pacific from Cape Horn or west coast of South America, for the United States.
| Month of crossing. | Longitude of crossing. | Lose SE. trades. Prob. lat. | Enter NE. trades. Prob. lat. | Lose NE. trades. Prob. lat. |
|---|---|---|---|---|
| January | 114° 00′ W. | 5° 00′ N. | 8° 00′ N. | 27° 00′ N. |
| February | 113° 30′ W. | 3° 30′ N. | 6° 30′ N. | 26° 00′ N. |
| March | 113° 30′ W. | 5° 30′ N. | 8° 30′ N. | 27° 00′ N. |
Vessels bound from Cape Horn to the line during the above months will meet the SE. trades (in longitude 90° W.) as follows: January, 29° S.; February, 28° S.; March, 26° S.
18 NOTE.
Between 25° to 50° W and 5° to 10° N the current sets to the eastward from July to December.