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THE MARINE REVIEW BLACK ROCK CANAL APPROACH canal, shall be under the direction of the authorized agents of the engineer officer in charge, and their orders and instructions must be obeyed. 4. For passage through the canal, vessels or boats belonging to the United States government shall have pre- cedence over all others. 5. All registered vessels or boats must pass through the canal in the order of their arrival at. the canal limits. 6. No vessel of 100 gross tons or over ghall navigate the Black Rock Canal at a rate of speed greater than five statute miles per hour. This rate of speed will require elapsed time to navigate between designated points, as follows: From south canal limit to Ferry Street bridge, 2214 minutes; from Ferry Street bridge to elena tional bridge, 1314 minutes. 7. No vessel shall pass or approach within 4% mile of a vessel bound in the same direction in the canal. Tugs with- out tows and boats under 100 gross tons are exempt from this rule. 8. No tow shall enter or pass through the canal with a tow line more than 400 feet in length. 9. No vessel or boat shall anchor in or moor along the canal within the limit of any portion of the 23-foot channel; and no business, trading, or landing of freight or baggage will be allowed on or over the canal lands or structures, except such articles as may bé readily carried in the hand, without the permission of the engineer officer or his agent. 10. No person shall throw or cause the discharge of any solid material of any kind into the canal, nor shall any vessel's or boat's boiler flues be cleaned while in the canal. 11. If any vessel, boat or other craft sinks or grounds in the canal, or in any other manner delays or obstructs navigation through the canal, the en- gineer officer in charge. or his agent, shall have the right to take possession of such vessel, boat or other craft and to remove it, as may be necessary to clear the obstruction caused by it; and no person shall do anything that will, or tend to, prohibit, or interfere with, his doing so. Ferry Street Bridge 12. The clear headroom under Ferry Street bridge is 15 feet at mean water level, which level is indicated by the zero of the gages on the bridge pier and west abutment. The times re- quired to lift the bridge is 114 minutes. 13. All vessels and boats which can- not pass under the bridge shall reduce October, 1914 speed on approaching the bridge suffi- cient to enable them to come to a dead stop, without touching the bridge, in case the movable span cannot be lifted. If the wind is dangerously strong, pas- sage' of the bridge shall not be attempted by large vessels without the aid of a tug or tugs. 14. Vessels and boats bound down (north) shall have the right of way and passage through the bridge over those upbound (south). 15. All vessels and boats desiring passage through the bridge shall signal therefor by one long and two short whistle-blasts. 16. Upon receiving the opening sig- nal, the bridge operator shall answer by giving the same signal on the bridge whistle and he shall then proceed at once to lift the bridge. 17. In case the bridge cannot be lifted, for any cause, the bridge ope- rator shall answer a vessel signal by giving five short whistle blasts; and the vessel shall then be stopped until the bridge is ready to be lifted, when the bridge operator shall give the whistle signal for passage and the vessel. nay proceed. ? 18. In case the bridge is disabled so that" it cannot be lifted for one-half hour or more, pending repairs, red flags shall be displayed on the bridge in day time and two red lantern lights, one above the other at night; and when such signals are displayed no vessel or boat shall signal for or attempt pas- sage through the bridge. 19. Bridge operators shall not close the bridge against a vessel or boat desiring to pass through it, until foot passengers or vehicles have been de- layed at least 15 minutes by the bridge being open for such vessel's or boat's passage. 20. No foot passengers or vehicles BLACK ROCK LOCK. UPPER GUARD GATES CLOSED AND LOCK UNWATERED si