AN act of Congress-that of July 25th, 1866 -prescribes that all coasting steamers and those navigating bays, lakes, or other inland waters, shall carry a green light on the starboard side, a red light on the port side, and in addition thereto a central range of two white lights, the after light being carried at an elevation of at least fifteen feet above the light at the head of the vessel; the head-light to be so constructed as to show a good light through twenty points of the compass, namely, from right ahead to two points abaft the beam on either side of the vessel; and the after light to show all around. It also enacts that ocean-going steamers shall carry 'at the foremast-head a bright white light,' on the starboard side a green light, and on the port side a red light; these two last so fixed as to throw the light from right ahead to two points abaft the beam, and fitted with in-board screens projecting three feet, so as to prevent these lights being seen across the bow.
A previous act, the well-known one of April 29th, 1864, 'for preventing collision on the waters,'  thus prescribes: ARTICLE 5. Sailing ships under way . . . shall carry the same lights as steamships under way, with the exception of the white masthead lights, which they shall never carry.
ARTICLE 13. If two ships under steam are meeting end on, so as to involve risk of collision, the helm of both shall be put to port so that each may pass on the port side of each other.
ARTICLE 15. If two ships, one of which is a sailing ship and the other a steamship, are proceeding in such directions as to involve risk of collision, the steamship shall keep out of the way of the sailing ship.
ARTICLE 16. Every steamship, when approaching another ship, so as to involve risk of collision, shall slacken her speed, or, if necessary, stop and reverse.
These two statutes being in force, the steam propeller North Hampton and the side-wheel steamboat Continental, two vessels of rival lines, were in the habit of making regular daily trips between New York and New Haven, on the Long Island Sound; the North Hampton leaving New York about 6 P.M. on one day, and the Continental leaving New Haven about midnight on the same day.
On the night of the 23d of October, 1868, the rival vessels were making their customary trips. That night, though cloudy and with occasional spits of rain, was not very dark nor windy. The sea was open and comparatively smooth. About midnight, the wind being north-northeast, the North Hampton approached New Haven, and by the captain's order steered straight east-northeast for the New Haven light-house; a right course apparently for her to steer when about to enter the harbor. She soon saw the lights of a steamer, which she inferred, and rightly, was the Continental coming down and out of the harbor. After the Continental came down the harbor, she changed her course to go down the Sound towards New York. 'When she first changed her course,' said the captain of the North Hampton, who was examined as a witness, 'she headed directly for the North Hampton, which,' said he, 'I could tell by her range of lights, they being exactly in range after she got her course.' He continued:'After a little her course varied, a little southerly. She was then, when she hauled up, on her course westerly, distant about three miles. I continued going our course east-northeast until I was distant from the Continental, I should judge, about three-quarters of a mile. She was then bearing a very little on our port bow, nearly ahead. I then gave one blast of the whistle and changed my course one point easterly to east by north. I received no response to that whistle for, I should say, nearly or quite a minute. I then heard two blasts of the Continental's whistle, which I immediately answered by one whistle, rung two bells to stop the boat, and in the meantime told the pilot to heave the wheel hard aport.'
Notwithstanding this the two steamers came violently together, the Continental striking the North Hampton on her port side a little abaft midships, nearly square on, and running through her in such a way that she went down in half an hour; her passengers just escaping with their lives.
The defence set up by the Continental for this collision was, the fact that the North Hampton had had no 'central range of two white lights;' for want of which, as the Continental alleged, she took the steamer for a sailing vessel, and starboarded her helm instead of porting it. On the subject of the North Hampton's lights generally, one of the boat's hands of that vessel who had been at the wheel prior to the collision, and left it when he saw the steamer coming down the Sound, testified thus:
'I found the bow light burning brightly. The side lights were also burning brightly. The stern light I found burning dim. There were two lanterns in one box. They showed as one light. I went aft and lowered it down. After I got the box down, I went into the door where the space is, out of the draft, so they would not blow out, and when there picked up the wicks of both lights, one after another. After that was done, I took them to the staff and put them in the box and hoisted them up. I heard the North Hampton blow one whistle. I was aft then, at the time of this first whistle, was just stepping inside the passage-way with the lights, as near as I can recollect. After an interval there was a reply with two whistles from the Continental. I was then coming out of the passage-way, as near as I can remember. The North Hampton blew one whistle again, directly after. I was then in the act of hoisting the lights at that time. After hoisting up the lights I saw the Continental coming for us, and I ran forward on starboard side. I got part of the way forward, when the vessels came together and the concussion knocked me down.'
It appeared from the testimony of those on board the Continental that they had, in point of fact, mistaken the North Hampton for a sailing vessel.
The lookout of the Continental-her forward deck lookout, who had no other duty than that of lookout-'not seeing the vessel itself, but seeing a green and white light'-which he judged to be then a mile or a mile and a half distant-reported, five or six minutes before the collision, 'Sail off starboard bow,' and was answered at the pilot-house, 'Aye, aye!'
The wheelsman, who heard the lookout's report, saw also a green and white light, 'but no red light then four or five minutes before the collision, as he judged, and a mile or a mile and a half off, the North Hampton's lights bearing pretty much the whole time, until it was too late to avoid the collision, about three points on the Continental's bow.' He thereupon starboarded his helm so as to keep her off.
The captain, who had been on the line for thirty years, and who was in the pilot-house with the wheelsman, said:
'I saw the North Hampton's green and white light; she had no stern light; sometimes in a sailing vessel they come forward and stick out a white light when they get frightened; sometimes they have a light forward to overhaul the anchor-chain.'
The captain added:
'A lookout reports a steamer as a steamer, and a vessel as a vessel; all he knows by is the lights; at night, he reports four lights as a steamer, and two lights as a vessel. If the vessel seen has one colored and only one bright light, he reports her as a sail vessel. That's his orders.'
On board the Continental there happened to be, going down the Sound that night, one Horton, for seven years a Hellgate pilot. He had been in the pilot-house, and saw a green and white light-the white light forward, but he saw no aft light. The vessel on which they were seemed to him, he testified, to be a sailing vessel. He said:
'I guessed she was a sailing vessel because she did not have any stern light; I could not see her hull when I first saw her. It is generally the case for a vessel coming into port to take a light forward, to get her chain and anchor ready to drop anchor. I went away from the pilot-house to the lower cabin after I saw the lights. From the time I left the pilot-house till the collision was five or six minutes. After the collision, I saw a stern light halfway up the flag-mast.'
As already mentioned, the Continental was starboarded under the impression that the North Hampton was a sailing vessel, and with a view of keeping out of her way. The North Hampton being in fact a steamer, and knowing that the approaching vessel was one, ported. A collision came of course.
The owners of the North Hampton having libelled the Continental in the District Court of Connecticut, that court dismissed the libel, considering that the North Hampton was in fault; having had no stern-light, and running in direct violation of law, which required her to have a central range of two white lights. The Circuit Court affirmed this decree, and the owners of the North Hampton brought the case here.
Messrs. C. Donohue, C. R. Ingersoll, and J. S. Beach, for the appellants:
Assuming that the steamer could see only the bow and side-lights of the propeller, it was a fault on her part to act as if they were the lights of a sailing-vessel. A white light is prohibited to a sailing vessel under way. She is forbidden to carry any other light than the green light on her starboard side, and the red light on her port side. Sea-going steamers are required to carry the single white light with the side colored lights. Coasting and inland water steamers carry the colored side-lights with the bow and stern white lights. The lights, therefore, which the steamer saw, were lights which a sea-going steamer must carry, but which a sailing-vessel must never carry. And the steamer assumed that the vessel carrying it was not the kind of vessel which the lights declared it to be, but was the kind of vessel which the lights declared it not to be. This was recklessness.
If a steamer sees a light which does not clearly indicate the character of the vessel carrying it, she has no right to jump to the conclusion that it is carried by a vessel of any particular class, and especially not of that class which is forbidden to carry such a light. It is her duty to ascertain the truty by all the cautionary means in her power. She must use all necessary vigilance to discover whether the strange light is a fixed light or not-and if fixed, whether it is on a vessel in motion or at anchor-and if on a vessel in motion, what is the course of that vessel as indicating whether she is moved by the wind or by steam. She must look for the strength of the light seen as distinguishing a regulation-light from an ordinary hand-lantern, commonly used about a vessel's deck-and watch for the sails of the vessel-her hull-the noise of her paddles, and the lights of her saloon, if a steamer-and for all the usual indications characterizing the different classes of vessels. And if this inquiry cannot be made without slackening her speed, she must slacken her speed. If not without blowing her whistle, as a signal, she must blow her whistle. She has no right to go on at all if she is in any reasonable doubt on the subject. If, without exercising all reasonable precautions, she insists upon going on, and a collision occurs, she takes the risk, and the fault is justly visited upon her. In the case of The Gray Eagle,  that vessel was held to be in fault because she did not, by watching the bearings of the light of another vessel coming towards her-The Perseverance-discover that the light was in motion, and therefore could not be upon a vessel at anchor. And she was condemned as in fault, although the Perseverance was carrying a light she had no right to carry. And such is the law of negligence everywhere. If a man goes upon a railroad track with shut eyes and deaf ears and is run over, it is in vain for him to complain that the whistle was not blown. In the present case no precaution whatever was taken by the steamer to discover the character of the approaching vessel. For it was manifest to the steamer, or should have been, that the vessel was approaching, and was bound into New Haven harbor. The steamer knew that the propeller was due at that place at that time. The two boats were accustomed to meet on every trip of the propeller, and were perfectly well known to each other. It was therefore the steamer's duty to look out for the propeller, just when and where the lights of this approaching vessel appeared. But at least there was reason for a doubt, and, if so, it was clearly her duty to settle that doubt. But those on board did not allow any doubt whatever to enter their mind. They assumed at once that it was a sailing-vessel thus coming toward them, right in the eye of the wind, and they adhered to that assumption stubbornly, until it resulted in disaster.
2. The character of the light was manifested to the steamer, beyond any question, by its bearings.
Those bearings are given to us by the wheelsman of the Continental as three points on the starboard bow when the light was first seen, and they continued the same without alteration until the collision, or until it was too late to avoid the collision. Now these bearings ought to have told those navigating the steamer, that the vessel carrying those lights was directly approaching the steamer. Otherwise they would have changed.
3. And the wind, it is admitted, was north-northeast. The vessel with the lights, therefore, was approaching directly in the eye of the wind. And yet the captain of the Continental swears that he supposed the North Hampton to be a sailing-vessel all the while, and the court below tells us that he was justified in that supposition.
Again: the wind being north-northeast, a sailing-vessel, in order to show her green light to the steamer, must have been on her starboard tack, and could not have lain closer to the wind on that tack than a northwest course. This course would have been nearly at right angles to the steamer's course, and, if the vessel sailing on it was first seen three points on the steamer's starboard bow, every minute would carry her further out of the steamer's way, and would of course change the bearings of her lights, and the relative distance between her lights.
4. The orders which the captain of the steamer testifies he had given to his lookout,  and upon which the lookout seems to have acted, on this occasion, shows him to have had a very confused notion of the object of the regulation lights, and indicates a habit of inattention to their particular significance. It is not surprising that a lookout, receiving such orders, should report the propeller as a sail, and is certainly not to be wondered at that the officer who could give them should adopt such a report as infallible, and shut his eyes and ears to any further evidence on the subject.
Messrs. E. H. Owen and T. C. Doolittle, contra:
The North Hampton was running in open violation of statutory requirement and of the well-settled rules of navigation adopted for the purpose of preventing collisions, in that she had no 'after light.'
It is probable that at no time was the after light such as the statute requires, for it is clear that it had been a poor, defective light for some time previous to its being taken down. But however this may have been, it was taken down at the exact moment that it was specially needed to be up, and kept down until the Continental was completely misled by the want of it, and a collision became inevitable.
The statute, by positive requirement, makes a central range of white lights obligatory in inland waters. The requirement applies to all vessels under steam except 'ocean-bound steamers.' And there is the greatest reason for the requirement, for without the central range of white lights the true course and direction of an approaching steamer cannot be had in narrow work. With nothing but the colored lights, steamers may be approaching nearly end on, and so as to involve the risk of collision, when one of them is not visible. The colored lights are to be so constructed as to shine from a point right ahead to two points abaft the beam, so that one steamer approaching another on nearly a parallel course, a very little off either hand, would only see one colored light, and could not thereby determine how near the two were appropaching 'end on.' The bow light alone would not enable the approaching steamer to determine this fact without the aid of the after light, giving thereby a central range of two white lights. If approaching directly end on, the two white lights will be in range, and if not, they will be 'open.'
It is no excuse for the North Hampton that her stern light, having become dim, had been temporarily removed for the purpose of being trimmed. 
The absence of the necessary range of lights did in fact deceive, and could not fail to deceive, those in charge of and navigating the Continental. The North Hampton was taken to be a sailing-vessel; she was reported as such, and the movements made on the part of the Continental were based upon that idea.
It is no answer to say that those navigating the Continental, upon reflection, might have known that the North Hampton could not have been a sailing-vessel, because a sailing-vessel does not carry a white light forward, and because, with that wind, a sailing-vessel could not have been heading as she was. Although sailing-vessels are not permitted by law to carry a white light, yet it was proved to be not unusual in the night, when making preparations for landing, to have a light on the forward deck in getting lines and chains ready. As she did not have the lights which steamers are required to carry, the Continental was not bound to presume, from the mere fact that a white light was seen at her bow, that the vessel whose lights were seen was a steamer. There is no evidence that 'ocean-bound steamers,' which carry a white light forward, ever frequent or are ever seen navigating any part of the Sound.
The North Hampton was also in fault in not having a lookout. The fact that she had one is not asserted on the other side. This was gross negligence. She was bound by law to have one. It was necessary for her guidance. The master and pilot had other duties to perform which rendered them incompetent.  The fact that the Continental was seen by the master and pilot does not obviate the objection. If she had had a vigilant lookout, the lights of the Continental and her direction would have been more carefully reported, and the collision might have been avoided. A vigilant lookout in the night, in a thoroughfare, is an absolute and inflexible necessity. No one can tell what might have been the effect of having a vigilant lookout forward.
The North Hampton was clearly in fault for sounding one blast of her whistle, and in attempting to cross over and pass the Continental on her left or port side, thus throwing herself right across the bows of the latter vessel.
The Continental was properly navigated and was not in any respect in fault. She was pursuing her lawful and proper course on her voyage. She had all the lights required by law properly set and burning brightly. She had a competent lookout properly stationed and faithfully attending to his duty. She had a competent engineer at his post who answered all the orders from the pilot-house promptly.
Mr. Justice CLIFFORD delivered the opinion of the court.
^1 14 Stat. at Large, 228.
^2 13 Id 58.
^3 9 Wallace, 505; see also Nelson v. Leland, 22 Howard, 48; The Louisiana v. Isaac Fisher et al., 21 Id. 1; The Birkenhead, 3 W. Robinson, 75
^4 See supra, foot of p. 348.
^5 Rogers v. St. Charles, 19 Howard, 108; Chamberlain v. Ward, 21 Id. 548.
^6 The Ottawa, 3 Wallace, 268.