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lights in the same vertical plane not less than 4 feet nor more than 6
feet apart, to show through 4 points of the compass; that is, from
right astern to 2 points on each quarter.
5. Rule for vessels which are moored or anchored and engaged in laying pipe or

operating on submarine construction or excavation.
Vessels which are moored or anchored and engaged in laying pipe
or operating on submarine construction or excavation, shall display
by day not less than 15 feet above the deck, where they can best be
seen from all directions, two balls not less than 2 feet in diameter, in
a vertical line not less than 3 feet and not more than 6 feet apart,
the upper ball to be painted in alternate black and white vertical
stripes 6 inches wide, and the lower ball to be painted a solid bright
red. By night they shall display three red lights, carried in a verti-
cal line not less than 3 feet nor more than 6 feet apart and not less
than 15 feet above the deck, and in such position as may best be seen
from all directions.

All the lights required by these special rules for dredges, wrecking boats, lighters, etc., shall be of such size and character as to be visible on a dark night with a clear atmosphere for a distance of at least 2 miles. 6. Rule for vessels which are moored or at anchor.

Vessels of more than 300 gross tons propelled by machinery when moored or anchored in a fairway or channel where traffic is liable to congestion or confusion shall display between sunrise and sunset on the forward part of the vessel where it can best be observed from other vessels one black ball or shape not less than 2 feet in diameter. 7. Lights to be displayed on pipe lines; floodlights.

Pipe lines attached to dredges, and either floating or supported on trestles, shall display by night one row of amber lights not less than 8 feet nor more than 12 feet above the water, about equally spaced and in such number as to mark distinctly the entire length and course of the line, the intervals between lights where the line crosses navigable channels to be not more than 30 feet. There shall also be displayed on the shore or discharge end of the line 2 red lights, 3 feet apart, in a vertical line with the lower light at least 8 feet above the water, and if the line is to be opened at night for the passage of vessels, a similar arrangement of lights shall be displayed on each side of the opening. The lights shall be of the same size and char. acter as specified in rule 5 above.

All floodlights or headlights of which the light rays point directly toward an approaching vessel shall be switched off until the passing vessel has reached a point where such lights will not blind the pilot. 8. Passing signals.

(a) General.-Vessels intending to pass dredges or other types of floating plant working in navigable channels, when within a reasonable distance therefrom and not in any case over a mile, shall indicate such intention by blowing the passing signal prescribed in the local pilot rules for vessels under way, which shall be answered in the usual manner from said plant if the channel is clear and the approaching vessel may pass on the course indicated; otherwise the floating plant shall sound the alarm or danger signal and the approaching

vessel shall slow down or stop and await further signal from the plant.

When the pipe line from a dredge crosses the channel in such a way that an approaching vessel, owing to excessive draft or for other reasons, cannot pass around the pipe line or dredge, a signal shall be given from the vessel by sounding 4 blasts of the whistle, which shall be answered by a like signal from the dredge. The pipe line shall then be opened for the passage of the vessel as soon as practicable; when the line is open ready for passage, the dredge shall so indicate by sounding the usual passing signal, and the approaching vessel shall promptly pass the dredge.

(b) Special passing signals applicable to the Mississippi River and its tributaries. Vessels intending to pass dredges or other types of floating plant working in navigable channels, when within a reasonable distance therefrom and not in any case over a mile, shall indicate such intention by one long blast of the whistle and shall be directed to the proper side for passage by the sounding, by the dredge or other floating plant, of the signal prescribed in the local pilot rules for vessels under way and approaching each other from opposite directions, which shall be answered in the usual manner by the approaching vessel. If the channel is not clear, the floating plant shall sound the alarm or danger signal and the approaching vessel shall slow down or stop and await further signal from the plant.

When the pipe line from a dredge crosses the channel in such a way that an approaching vessel cannot safely pass around the pipe line or dredge, there shall immediately be sounded from the dredge or floating plant the alarm or danger signal and the approaching vessel shall slow down or stop and await further signal from the plant. The pipe line shall then be opened and the channel cleared as soon as practicable; when the channel is clear for passage the dredge or plant shall so indicate by sounding the usual passing signal as before prescribed. The approaching vessel shall answer with a corresponding signal and promptly pass.

When any pipe line or swinging dredge shall have given an approaching steam vessel or tow the signal that the channel is clear, the dredge shall straighten out within the cut for the passage of said steam vessel or tow. 9. Speed of vessels passing floating plant working in channels.

Steamers, with or without tows, passing floating plant working in channels, shall reduce their speed sufficiently to insure the safety of both the said plant and themselves, and when passing within 200 feet of the said plant their speed shall not exceed 5 miles per hour. While passing over lines of the said plant, propelling machinery shall be stopped. 10. Light-draft vessels passing floating plant.

Vessels whose draft permits shall keep outside of the buoys marking the ends of mooring lines of floating plant working in channels. 11. Aids to navigation marking floating plant moorings.

Breast, stern, and bow anchors of floating plant work in navigable channels' shall be marked by barrel or other suitable buoys. By night approaching vessels shall be shown the location of adjacent buoys by throwing a suitable beam of light from said plant on the buoys until the approaching vessel has passed, or the buoys may be lighted by red lights, visible in all directions of the same size and character as specified in rule 5 above: Provided, That the foregoing provisions of this paragraph shall not apply to the following waters of New York Harbor and adjacent waters; namely, the East River, the North River (Battery to Spuyten Duyvil), the Harlem River, and the New York and New Jersey Channels (from the Upper Bay through the Kill Van Kull, Newark Bay, Arthur Kill, and Raritan Bay to the Lower Bay). 12. Obstruction of channel by floating plant.

Channels shall not be unnecessarily obstructed by any dredge or other floating plant. While vessels are passing such plant, all lines running therefrom across the channel on the passing side, which may interfere with or obstruct navigation, shall be slacked to the bottom of the channel. 13. Protection of marks placed for the guidance of floating plant.

Vessels shall not run over anchor buoys, or buoys, stakes, or other marks placed for the guidance of floating plant working in channels; and shall not anchor on the ranges of buoys, stakes, or other marks placed for the guidance of such plant.

NOTE.-If it is necessary to prohibit or limit the anchorage or movement of vessels within certain areas in order to facilitate the work of improvement, application should be made through official channels for establishment by the Secretary of War of special or temporary regulations for this purpose. 14. Clearing of channels.

When special or temporary regulations have not been prescribed and action under these rules and regulations will not afford clear passage, floating plant in narrow channels shall, upon notice, move out of the way of vessels a sufficient distance to allow them a clear passage. Vessels desiring passage shall, however, give the master of the floating plant ample notice in advance of the time they expect to pass. 15. Revocation of conflicting regulations.

All regulations or parts of regulations in conflict with these regulations are hereby revoked.

Approved, May 19, 1928.

MOTORBOAT ACT OF APRIL 25, 1940

AN ACT TO AMEND LAWS FOR PREVENTING COLLISIONS OF VESSELS, TO REGU

LATE THE EQUIPMENT OF CERTAIN MOTORBOATS ON THE NAVIGABLE WATERS OF THE UNITED STATES, AND FOR OTHER PURPOSES

Motorboat defined; inspection Be it enacted by the Senate and House of Representatives of the United States of America in Congress assembled, That the word “motorboat” where used in this Act shall include every vessel propelled by machinery and not more than sixty-five feet in length except tugboats and towboats propelled by steam. The length shall be measured from end to end over the deck, excluding sheer: Provided, That the engine, boiler, or other operating machinery shall be subject to inspection by the local inspectors 1 steam vessels, and to their approval of the design thereof, on all said motorboats, which are more than forty feet in length, and which are propelled by machinery driven by steam.

Classes of motorboats SEC. 2. Motorboats subject to the provisions of this Act shall be divided into four classes as follows:

Class A. Less than sixteen feet in length.
Class 1. Sixteen feet or over and less than twenty-six feet in length.
Class 2. Twenty-six feet or over and less than forty feet in length.

Class 3. Forty feet or over and not more than sixty-five feet in length.

Lights SEC. 3. Every motorboat in all weathers from sunset to sunrise shall carry and exhibit the following lights when under way, and during such time no other lights which may be mistaken for those prescribed shall be exhibited:

(a) Every motorboat of classes A and 1 shall carry the following lights: First. A bright white light aft to show all around the horizon,

Second. A combined lantern in the fore part of the vessel and lower than the white light aft, showing green to starboard and red to port, so fixed as to throw the light from right ahead to two points abaft the beam on their respective sides.

(b) Every motorboat of classes 2 and 3 shall carry the following lights:

First. A bright white light in the fore part of the vessel as near the steam as practicable, so constructed as to show an unbroken light over an arc of the horizon of twenty points of the compass, so fixed as to throw the light ten points on each side of the vessel; namely, from right ahead to two points abaft the beam on either side.

1 Local inspectors have been abolished by order of the Commandant, U. S. Coast Guard, and are replaced by Officers in Charge, Marine Inspection.

Second. A bright white light aft to show all around the horizon and higher than the white light forward.

Third. On the starboard side a green light so constructed as to show an unbroken light over an arc of the horizon of ten points of the compass, so fixed as to throw the light from right ahead to two points abaft the beam on the starboard side. On the port side a red light so constructed as to show an unbroken light over an arc of the horizon of ten points of the compass, so fixed as to throw the light from right ahead to two points abaft the beam on the port side. The said side lights shall be fitted with inboard screens of sufficient height so set as to prevent these lights from being seen across the bow.

(c) Motorboats of classes 2 and 3, when propelled by sail and machinery, or by sail alone, shall carry the colored side lights, suitably screened, but not the white lights prescribed by this section: Provided, however, That motorboats of all classes, when so propelled, shall carry, ready at hand, a lantern or flashlight showing a white light which shall be exhibited in sufficient time to avert collision: Provided further, That motorboats of classes A and 1, when so propelled, shall not be required to carry the combined lantern prescribed by subsection (a) of this section.

(d) Every white light prescribed by this section shall be of such character as to be visible at a distance of at least two miles. Every colored light prescribed by this section shall be of such character as to be visible at a distance of at least one mile. The word "visible" in this Act, when applied to lights, shall mean visible on a dark night with clear atmosphere.

Whistles

SEC. 4. Every motorboat of class 1, 2, or 3, shall be provided with an efficient whistle or other sound-producing mechanical appliance.

Bells

SEC. 5. Every motorboat of class 2 or 3 shall be provided with an efficient bell,

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SEC. 9. The provisions of sections 4, 5, and 8 of this Act shall not apply to motorboats propelled by outboard motors while competing in any race previously arranged and announced or, if such boats be designed and intended solely for racing, while engaged in such navigation as is incidental to the tuning up of the boats and engines for

the race.

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Pilot rules not required SEC. 12. Motorboats shall not be required to carry on board copies of the pilot rules.

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