"engineers and support corps normally had a single branch colour, although exceptionally each regiment of Swedish artillery had its own facing colour until 1910. The United States regular army after the American Civil War adopted a universal dark and light blue uniform under which each regiment was distinguished only by numbers and other insignia, plus branch colors. The latter were yellow for Cavalry, red for Artillery and white (later light blue) for infantry. Combinations of colors such as scarlet piped with white for Engineers, orange piped with white for the Signal Corps and black piped with scarlet for Ordnance personnel"
"the starboard side (the right side from the perspective of someone on board facing forward), a red light from dead ahead to two points abaft the beam on the port side (left side) and a white light that shines from astern to two points abaft the beam on both sides. Power driven vessels, in addition to these lights, must carry either one or two (depending on length) white masthead lights that shine from ahead to two points abaft the beam on both sides. If two masthead lights are carried then the aft one must be higher than the forward one."
"Blue sign A blue sign or blue board is used by inland waterways vessels within the Trans-European Inland Waterway network when performing a special manoeuvre or passing on the starboard side. On navigable waterways vessels normally pass each other on the port-side, so the display of the blue sign and flashing white light signal intention to pass each other on the starboard-side. This process is known as blue boarding or historically blue flagging. The """" (CEVNI) regulations require upstream vessels operating on the opposite side to display a light-blue sign and scintillating (flashing) white light. Article 3.03 states that the"
"side of the vessel, a flashing green on the starboard side of the vessel, two flashing white lights on the top and one flashing yellow on the bottom side of the fuselage. The SpaceX Dragon cargo spacecraft also features a flashing strobe along with red and green lights. Navigation light A navigation light, also known as a running or position light, is a source of illumination on a vessel, aircraft or spacecraft. Navigation lights give information on a craft's position, heading, and status. Their placement is mandated by international conventions or civil authorities. Navigation lights are not intended to provide"
"this white light, it can pass safely. The rest shows a red light from 195 to 322°. If a vessel sees this light, it should alter its course. Another example is the PEL sector light at Diego Garcia. The PEL sector light was constructed to guide US Navy vessels into the Diego Garcia port through a narrow entrance in the lagoon. The PEL sector light produces 3.5 million candela and is visible for 10 nautical miles (18.5 km) by day. The beam with 3 colors is narrow at 1.6°. This was required because the PEL sector light was built over"
"vessel's starboard side by green and its port side by red. Aircraft are lit in the same way. Port and starboard Port and starboard are nautical and aeronautical terms of orientation that deal unambiguously with the structure of vessels and aircraft. Their structures are largely bilaterally symmetrical, meaning they have mirror-image left and right halves if divided long-ways down the middle. One asymmetric feature is that on aircraft and ships where access is at the side, this access is usually only provided on the port side. To understand which is which, when a person is facing the bow on a"
"numbering is ""Even Red Left Port"" (as in Eric the Red) - Even Numbered buoys are red, on your left (port) side leaving port. In any case, since in many harbours it is not always apparent which direction is seaward, buoys should be used in connection with the appropriate nautical chart. Additionally, since marks may be off station due to collision with ships, storms or other factors, they should be used with caution and not relied on solely for navigation. The two regions are often referred to as two systems, which was the original intent. In 1980 it was decided"
"Lateral mark A lateral buoy, lateral post or lateral mark, as defined by the International Association of Lighthouse Authorities, is a sea mark used in maritime pilotage to indicate the edge of a channel. Each mark indicates the edge of the safe water channel in terms of port (left-hand) or starboard (right-hand). These directions are relative to the ""direction of buoyage""; this is usually a nominally upstream direction. In a river, the direction of buoyage is towards the river's source; in a harbour, the direction of buoyage is into the harbour from the sea. Where there may be doubt, it"
"Navigation light A navigation light, also known as a running or position light, is a source of illumination on a vessel, aircraft or spacecraft. Navigation lights give information on a craft's position, heading, and status. Their placement is mandated by international conventions or civil authorities. Navigation lights are not intended to provide illumination for the craft making the passage, only for other craft to be aware of it. In 1838 the United States passed an act requiring steamboats running between sunset and sunrise to carry one or more signal lights; color, visibility and location were not specified. In 1848 the"
"the two lights together guide the ships to the center of the entrance channel. After passing through the channel between Castle and Kettle points, the fixed light provided at the guard station at the southern end of the town guides ships into the anchorage through the fairway. Red light is flashed to indicate shoals to the north of the harbour and green light is flashed to indicate the shoals over the south point, off ""One Gun Point"". A day time beacon in the form of a truncated pyramid of height on the land to the eastern side of the entrance,"
"to the south. The range lights are set on the north side of the second turn; the first is marked by the Doubling Point Light. The range lights are oriented so that they are in alignment when seen from the main channel to the south. The light station consists of two octagonal wood frame towers, a keeper's house, and an oil house. The towers are joined to the keeper's house by wooden walkways with railings. The southern tower is in height, while the northern one is tall. When a ship is properly in the main channel, only the southern light"
"""returning"" to (""i.e."", entering) a harbour or river. Lateral mark A lateral buoy, lateral post or lateral mark, as defined by the International Association of Lighthouse Authorities, is a sea mark used in maritime pilotage to indicate the edge of a channel. Each mark indicates the edge of the safe water channel in terms of port (left-hand) or starboard (right-hand). These directions are relative to the ""direction of buoyage""; this is usually a nominally upstream direction. In a river, the direction of buoyage is towards the river's source; in a harbour, the direction of buoyage is into the harbour from"
"of buoys depending on their purpose, the IALA Maritime Buoyage System. For historical reasons, there are two regions of lateral marks in use: The two regions differ principally in the colours used to denote the two sides of a channel. When approaching a harbour from seaward, ""Region A"" places conical green marks to starboard and cylindrical red ones to port. In ""Region B"" these are replaced with conical red marks to starboard and cylindrical green ones to port. This can be remembered (for ""Region B"") with the mnemonic """"Red, right, return"""". Another ""Region B"" mnemonic, which also helps with buoy"
"on either end of both bridge piers. At night, coloured lights were used, in either direction, on both piers: two red lights to show that the bridge was closed, and two green to show that it was open. In foggy weather, a gong was sounded as well. Vessels passing through the bridge had to display signals too: by day, a black ball at least in diameter was to be mounted high up where it could be seen; by night, two red lights in the same position. Foggy weather required repeated blasts from the ship's steam whistle. If a black ball"
"can be used at temporary locations or sites removed from the electrical grid. PEL sector light The PEL sector light is a projector style marine beacon which is used to guide maritime vessels. It does this by projecting a colored sector out to sea with very sharp color changes as the mariner transitions from one sector to the next. Typical PEL sector lights will have a complete color change over 1 meter (sideways movement) when the mariner is 5 km from the beacon. The PEL's application becomes relevant to the mariner when combined with a local marine chart as each"
"PEL sector light The PEL sector light is a projector style marine beacon which is used to guide maritime vessels. It does this by projecting a colored sector out to sea with very sharp color changes as the mariner transitions from one sector to the next. Typical PEL sector lights will have a complete color change over 1 meter (sideways movement) when the mariner is 5 km from the beacon. The PEL's application becomes relevant to the mariner when combined with a local marine chart as each application of a PEL varies greatly. They are used for guiding vessels into"
"degrees true as observed from sea. Though the colors of the light will change, the characteristics will not. The change of color is not abrupt. The transition is made through an arc of uncertainty of 2° or greater. The colors that are used, are conform to the IALA Maritime Bouyage system that is designed by the International Association of Lighthouse Authorities: A ship that is sailing in safe water and then sees the red (or green) color of the light has to make an alteration in course. The world has different navigation stereotypes managed by IALA (International Association of Lighthouse"
"seen on the port bow about 6 or 7 nm away; the lights were at that time open to starboard. A few minutes later, the green side light of ""Empress of Ireland"" was seen apparently from 3 to 5 miles away. The green light remained for an interval, and then ""Empress of Ireland"" was seen to make a change in her course. Her masthead lights came into a (vertical) line, and she showed both the green and the red side lights. She then continued to swing to starboard, shutting out the green and showing only the red light. This light"
"ship into a safe place"") and lights are fixed markers that are laterally displaced to allow a mariner to navigate a fixed channel along the preferred route. They are also known as ""channel markers"". They can normally be used coming into and out of the channel. When lit, they are also usable at night. Customarily, the upper mark is up-hill from the lower (forward) mark. The mariner will know the geometry of the marks/lights from the navigational chart and can understand that when ""open"" (not one above the other) the ship needs to be navigated to ""close"" the marks (so"
"from open water towards harbor, marks with cylindrical topmarks or square dayboards are kept to port in both regions, but colors and numbers are reversed. When lateral beacons are paired, vessels should pass between the pairing. However, beacons are also frequently placed individually. Generally, single lateral beacons are at the inside corner of a turn. Interior or exterior placement can be determined based upon the passing side (port or starboard) dictated by beacon designation. However, a current chart should always be consulted for all but the shallowest-draft vessels, as channel conditions are rarely ideal. Cardinal day beacons are used to"
"7NM (13 km) from the atoll entrance and it had to illuminate a safe entrance which is only 228 meters wide. Sector light A sector light is a man-made pilotage and position fixing aid that consists of strictly de-limited horizontal angle light beams to guide water-borne traffic through a safe channel at night in reasonable visibility. Sector lights are most often used for safe passage through shallow or dangerous waters. This may be when leaving or entering harbour. Nautical charts (paper and electronic) give all the required information. Sectors of colored glass (or plastic) are placed in the lanterns of"
"Sector light A sector light is a man-made pilotage and position fixing aid that consists of strictly de-limited horizontal angle light beams to guide water-borne traffic through a safe channel at night in reasonable visibility. Sector lights are most often used for safe passage through shallow or dangerous waters. This may be when leaving or entering harbour. Nautical charts (paper and electronic) give all the required information. Sectors of colored glass (or plastic) are placed in the lanterns of these lights. The light will then show these colors when observed certain bearings. Bearings referring to a sector are given in"
"harbour entrance. Land was reclaimed so quays and warehouses could be built. The inner harbour was opened on 4 May 1897 when the steamer ""Sultan"" drawing just one foot of water with Lady Forrest at the wheel was the first ship to enter the partly built port. ""While the harbour has been deepened, and facilities extended and modernised over the years, the basic structure of the Inner Harbour remains essentially unchanged to this day, testament to the boldness, brilliance and foresight of its designer."" There are two lighthouses on either side of the entrance to the harbour, the green coloured"
"Stern The stern is the back or aft-most part of a ship or boat, technically defined as the area built up over the sternpost, extending upwards from the counter rail to the taffrail. The stern lies opposite of the bow, the foremost part of a ship. Originally, the term only referred to the aft port section of the ship, but eventually came to refer to the entire back of a vessel. The stern end of a ship is indicated with a white navigation light at night. Sterns on European and American wooden sailing ships began with two principal forms: the"
"at Pier Two at the Naval Education Training Center, Newport, R.I. The ship's shield is dark blue and gold which are the colors traditionally used by the Navy to reflect the sea and excellence. Black is indicative of strength and stability. Blue denotes loyalty and devotion. White is emblematic of integrity and is symbolic of sea foam and breakers. The two mines recall the two previous ships of the same name and underscore the ""Black Hawk""'s mine hunting capabilities. The stylized paddlewheel is reminiscent of the first ""Black Hawk"" (a sidewheel steamer which served as flagship for Rear Admiral D.D."
"as white. The crest is the part above the shield, excluding the helmet. The wreath is twist of cloth and the colours are those already mentioned vis white and green. A “Lymphad” is a sailing ship and “proper” means it is shown in its natural colours. The sail is set for sailing and a “Pennon” is the long flag flying from the mast and being “gules” it is red. The smaller flags are blue (“azure”) and are also flying. In front of the ship is a whale and again “proper” means it is shown in its natural colours. The Supporters"
"Anchorage No. 9 is in the vicinity of the mouth of Mantua Creek, to which the river channel is . Tinicum Island Rear Range Light and Tinicum Front Range Light, known as the Billingsport Front Light, are a pair of range lights serving the downstream reach of the port. These front and rear range lighthouses guide sailors who, by aligning the two lights and keeping one light on top of the other, stay in the channel's center and avoid Little Tinicum Island. The rear light is listed on the state and federal registers of historic places. The port is located"
"the funeral convoy so that it is given the right of way. Yellow flag (contagion) In International maritime signal flags, plain yellow, green, and even black flags have been used to symbolize disease in both ships and ports, with the color yellow having a longer historical precedent, as a color of marking for houses of infection, previous to its use as a maritime marking color for disease. The present flag used for the purpose is the ""Lima"" (L) flag, which is a mixture of yellow and black flags previously used. It is sometimes called the ""yellow jack"", which became a"
"two types of insignia used by Coast Guard Academy cadets. The first is a metal pin-on device. It is a colored shield with a gold anchor with a silver star above it. The color of the background denotes the class. The colors are green for 4/c, red for 3/c, white for 2/c and blue for 1/c. The colors all have historic meanings: red and green represent the running lights on a vessel; white signifies the white lights used as navigation lights, signifying the role as guides for the 4/c; blue represents the blue lights of law enforcement vessels that that"
"were usually equipped with some form of optical sight, and were most commonly used on naval vessels and in airport control towers (using color signals for stop or clearance). In manual signaling, a signalman would aim the light at the recipient ship and turn a lever, opening and closing the shutter over the lamp, to emit flashes of light to spell out text messages in Morse code. On the recipient ship, a signalman would observe the blinking light, often with binoculars, translating the Morse code into text. Signal lamps were pioneered by the Royal Navy in the late 19th century"
"vehicles from Britain to the continent (road only vehicles did not receive TOPS numbers). They were of various ages and origins, but all carried the BR double arrow logo on their red funnels. This was generally set up so that the upper arrow pointed towards the bow, and so was reversed on the port side of the ship. The hull was painted blue, with ""Sealink"" written in large grey letters between the waterline and the deck. A grey stripe was painted on some around parts of the top of the hull, with the main body of the ship being grey"
"is fully automated, has a solar power unit and two alternating red single flashing in a 6 seconds period with a focal plan at 8 metres above sea level visible up to 6 nautical miles. This sector light is placed at the extremity of ""Molo Mediceo"" at the entrance of Medicean Port. The light is a compact metal structure similar to a classic bottle painted in green operated by Marina Militare with the identification number 1951 E.F.; it is fully automated, has a solar power unit and two alternating green single flashing in a 6 seconds period with a focal"
"visibility, normally had bright red hulls which displayed the name of the station in white, upper-case letters; relief light vessels displayed the word RELIEF, instead. A few ships had differently coloured hulls. For example, the Huron Lightship was painted black since she was assigned the black buoy side of the entrance to the Lake Huron Cut. The lightvessel that operated at Minots Ledge, Cohasset, Mass. from 1854 until 1860 had a light yellow hull to make it visible against the blue-green seas and the green hills behind it. David Avery and Robert Hamblin in 1731 placed the earliest British lightship"