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Keep a record of authorities for new names and proposed changes in names (see 162 and 163). 



GRAVING DOCKS.— (See Marine railways.) 



GRIDIRONS. — State where these are available alongside wharves for docking small craft between 

 tides. Beaches where small craft are commonly beached, or that are especially suitable for this pur- 

 pose should be mentioned. 



HARBOR MASTERS.- — The harbor master, if there is one, is likely to be one of the best sources 

 of local information. A special effort should be made to contact this official. He is most likely to 

 know definitely the rules or regulations of the port that are in effect. He is also likely to be exceed- 

 ingly well informed about local changes, and it is desirable that amicable relations be established 

 with him so that he will be willing to furnish information to this OfRce by mail, if desired. The fact 

 that there is a harbor master should be noted in the text, under the name of the port, and the port 

 should be listed in the table of harbor masters in the appendix. 



In small towns the harbor masters change so frequently that it is not practicable to list the latter 

 by name. The list in the appendix, however, should include the name of each town having a harbor 

 master and the address of his office if one is maintained, or, if not, the place where the harbor master 

 may be usually found. 



HARBOR REGULATIONS. — Those parts of harbor regulations that are of value to the navi- 

 gator should be given. Special regulations for the control of certain industries should not be given 

 except as they apply to navigation. As an example of this, consider the detailed regulations to 

 control the handling of oils. Fuel oil, gasoline, and other oils are practically always handled by spe- 

 cialists. They are familiar with the regulations and are informed when changes are made. There is 

 no need to include regulations of that kind in the Pilots, but the navigator should be warned of any 

 precautions that he is required to take when bunkering or handling oils. 



Information should be given as to where harbor regulations may be obtained and where the 

 official responsible for the regulations and their enforcement may be contacted. 



HARBORS OF REFUGE.— List in Chapter 2 of the Pilot, under local information, the best 

 harbors of refuge in the region. Give full description in the proper place in the text, with informa- 

 tion as to accessibility under difficult weather conditions. Give depth in channel and in harbor, 

 character of bottom, peculiarities of weather, amount of protection afforded, security, swinging 

 room, etc. (See Anchorages in general.) 



HIGHWAYS. — State what highway connections there are in isolated localities. 



HOSPITALS, MARINE. — Give locations of these in the text and list them in the appendix. 

 If the Public Health Service has no hospital of its own, mention any other hospitals; in some cases 

 give the location of and distance to the nearest Marine Hospital. 



HYACINTHS, GRASS, WEED, MARINE GROWTHS, ETC.— State to what extent they 

 affect navigation. 



ICE. — The extent to which it interferes with navigation and the approximate dates between 

 which this condition usually exists should be given. Describe in detail, giving effect of wind, kind 

 of ice, whether channels are kept open by ice breakers, and to what extent aids to navigation are 

 affected. Describe average conditions, but give additional information about conditions in the 

 most severe winters, if available. 



ILLUSTRATIONS.— In the Pilots now published by the U. S. Coast and Geodetic Survey, 

 there is little, if any, need for illustrations. The comparatively complete charts and system of aids 

 to navigation are sufficient for navigation without illustrations, except in a very few regions. Of 

 these regions it is very difficult, if not impracticable, to obtain illustrations of value. Illustrations of 

 well-known and easily recognizable features should not be used; they are not worth the expense. 



The title of any illustration published should include the bearing and approximate distance of 

 the feature from the camera station. 



INLAND RULES.— (See Rules of the Road.) 



INTRACOASTAL WATERWAY.— The amount of information that should be included in 

 the general Coast Pilots regarding the Intracoastal Waterway, and in the Intracoastal Waterway 

 Pilots regarding the coastal areas, will be determined by the writer for each area. Generally Coast 

 Pilots should contain descriptions of the inlets and waterways leading to the ports at which vessels 

 engaged in coastwise trade caU. If there is an inside route from these ports to the other ports, that 

 fact should be stated and the controlling depth given, but details must be omitted. A cross-reference 

 should be made to the Intracoastal Waterway Pilot, where the route is fully described. In this way 

 detailed correction will need to be made in only one publication, thereby simplifying the problem of 

 keeping the Pilots up to date. 



