INTERNATIONAL ICK OBSERVATION AND ICE PATHOL SERVICE. 5 



(b) At 4 a. m. (seventy-fifth meridian time) a radiogram will be 

 sent to the branch Hydrographic Office, New York City, defining the 

 ice danger zone, its southern limits, or other definite ice news. The 

 telegraphic address of the Hydrographic Office is "Hydrographic, 

 New York." 



(c) Ice information will be given at any time to any ship with 

 which the patrol vessol can communicate. 



(d) Communication probably can be carried on throughout the 

 patrol via the naval radio stations at Otter Cliffs, Me., and Boston, 

 Mass. Dispatches from Headquarters to vessels on ice patrol will be 

 sent via the naval radio station at Boston, Mass. Vessels on patrol 

 should, when practicable, send all reports via the Otter Cliffs Radio 

 Station, using either 952 or 975 meter wave length. If Otter Cliffs 

 can not be reached, reports may be sent via Cape Race or by the 

 most convenient route. Whenever for any reason patrol vessels are 

 unable to hear the radio station at Boston, Mass., Headquarters 

 should be notified of that fact at once via any available route, in order 

 that messages may be transmitted to patrol vessels by route other 

 than Boston. 



6. Ice information will be given in as plain, concise English as 

 practicable, and will state in the following order: 



(a) Ice (berg or field) . 

 (6) Date. 



(c) Time (seventy-fifth meridian time). 



(d) Latitude. 



(e) Longitude. 



if) Other data as may be necessary. 



7. Attention is called to article 3235 (c). Regulations, the pro- 

 visions of which wiU be followed in radiograms sent to the Hydro- 

 graphic Office. (See par. 5 (b) of this order.) In radiograms sent to 

 vessels other than Coast Guard cutters tlie words "latitude" and 

 "longitude" will be used. 



8. Each patrol vessel will keep a remark book in which will be 

 entered all data and information concerning the ice that can bo 

 collected. 



9. Each vessel, on being relieved by the other vessel, will deliver 

 to the relieving vessel copies of all radiograms sent to or received 

 from the Hydrographic Office during the cruise, and copies of all 

 instructions received from Headquarters by radio. 



10. At the end of each cruise each vessel will forward to Head- 

 quarters a full report in triplicate. These reports should not include 

 any matters of purely ship's business which do not relate to the ice 

 patrol. Each vessel wUl send these reports direct to Headquarters 

 and furnish a copy of such reports to tha other vessel on patrol. 



