This typically includes many events and occurrences, such as the regular sighting of people who dress in 19th century clothing, house tours, the reading of winter-related poetry, caroling, and booths set up by local businesses.

Fire-control system on the T-90 includes the PNK-4S / SR AGAT day and night sighting system mounted at the commanders station which allows for night time detection of a tank sized target at ranges between 700 and 1100 meters depending on the version of the sight.

The gunner is also provided with the 1G46 day sighting system which includes a laser range finder, missile guidance channel and allows tank-sized targets to be detected and engaged at.

" This count includes the repeater signal provided in advance of SP65 because a curve in the tunnel interferes with sighting.

Many users prefer a simple sighting tube, which has a wider, brighter field of view and is easier to use at night.

Both Trident versions are three-stage, solid-propellant, inertially guided missiles, and both guidance systems use a star sighting to improve overall weapons system accuracy.

Pope Sylvester II applied the use of sighting tubes with his armillary sphere in order to fix the position of the pole star and record measurements for the tropics and equator.

Strabismus usually results in normal vision in the preferred sighting ( or " fellow ") eye ( the eye that the person prefers to use ), but may cause abnormal vision in the deviating or strabismic eye due to the difference between the images projecting to the brain from the two eyes.

The sighting eyepiece was located in the middle, between the two, in a less than convenient location that required some dexterity to use.

It is recognized by the National Arborist Association and International Society of Arboriculture for its historical significance as " a campsite for the Portola Expedition Party of 1769 "; being frequented by the Costanoan / Ohlone Indians ; and for its use as a sighting tree by surveyors plotting out El Camino Real.

Another reported sighting was of Andrews frantically throwing deck chairs into the ocean for passengers to use as floating devices.

Iron sights are a system of shaped alignment markers ( usually metal ) used as a sighting device to assist in the aiming of a device such as a firearm, crossbow, or telescope, and exclude the use of optics as in telescopic sights or reflector ( reflex ) sights.

The use of round rear and front sighting elements for aiming at round targets, like used in ISSF match shooting, takes advantage of the natural ability of the eye and brain to easily align concentric circles ( circles all having a common centre ).

It is still in use with the Russian army as a direct fire support weapon for infantry troops ; it is also installed in several vehicle mounts and turrets along with machine guns, guided rocket launchers and sighting equipment.

In yet another example of the widespread use of Shure microphones by the U. S. military, U. S. lookout Private Lockhard used a Shure 700A microphone to announce his sighting of Japanese planes approaching Pearl Harbor on the morning of On December 7, 1941.

In appearance and use, a pelorus resembles a compass or compass repeater, with sighting vanes or a sighting telescope attached, but it has no directive properties.

Modifications were the addition of a new optical sighting system, a hydraulic buffer to smooth out recoil during automatic fire, and a collapsing butt stock similar to the one already in use on the carbine versions of the M16.

Rather than use a sighting telescope, this instrument has a sighting pinnula.

The other main difference in sighting arrangements was the use of an elevation angle or alternatively the range.

For example, a Browning trap version of the Superposed over/under, the Broadway ( from $350 up, depending on grade ), differs from standard models in that it is equipped with a full beavertail fore end, a cushion recoil pad and a barrel-wide ventilated rib for fast sighting.

After three months of intense work, he predicted a position for Ceres in December 1801 — just about a year after its first sighting — and this turned out to be accurate within a half-degree when it was rediscovered by Franz Xaver von Zach on 31 December at Gotha, and one day later by Heinrich Olbers in Bremen.

However, on May 8, 2010, a sighting of a gray whale was confirmed off the coast of Israel in the Mediterranean Sea, leading some scientists to think they might be repopulating old breeding grounds that have not been used for centuries.

While recent evidence suggesting that American Ivory-billed Woodpeckers may still exist in the wild has caused excitement in the Ornithology community, no similar evidence exists for the Cuban Ivory-billed bird, believed to be extinct since the last sighting in the late 1980s.

The term is generic, used for any unusual, threatening or strangely behaved individual whose appearance on the scene can be linked in some fashion with a UFO sighting.

The latitude of the North Pole is 90 ° N, and the latitude of the South Pole is 90 ° S. Historically, mariners calculated latitude in the Northern Hemisphere by sighting the North Star Polaris with a sextant and sight reduction tables to take out error for height of eye and atmospheric refraction.

Subsequent sightings between this date and 1829 were made by other Europeans, but as in the case of the sighting and observations made by Vlamingh, the area was considered to be inhospitable and unsuitable for the agriculture which would be needed to sustain a settlement.

This method is less likely to be successful for sighting stars and planets.

The sighting for the device was also originally intended to be a cheap pentaprism device, that would allow the user to look down from above and see the sight picture.

Their units were later upgraded to the M551A1 model, including a thermal sighting system for the commander and gunner.

Other explanations for the sighting proposed that it was actually an upside-down canoe, or a posing giant squid.

The following table sets out the astronomical designations for every apparition of Halley's Comet from 240 BCE, the earliest documented widespread sighting.

This type of instrument was later improved, with more carefully scribed discs providing better angular resolution, as well as through mounting telescopes with reticles for more-precise sighting atop the disc ( see theodolite ).

In latter years, it has been a resort for the German jet set and tourists in search of occasional celebrity sighting.

The park is good location for the sighting of nocturnal animals such as the Mountain Brushtail Possum, the ringtail possum and sugar glider.

A major reason why latitude makes for convenient borders in the northern hemisphere is because it is readily measured by sighting the North Star.

The Roundhill Mill site in the Cliffe lane area of Gomersal is known for the sighting of the scratje ( pronounced Skrayty ), a legendary Norse spirit supposedly observed by a son prior to the death of his father and characterised by a cold and apparently sourceless light which moves erratically. The old name for Cliffe Lane was Scrat Lane.

In Cape Town, hundreds of Muslims will gather at Green Point in the evening of the last day of Ramadan each year for the sighting of the moon.

The crew survived remaining safe within the tank until the tank was recovered for repairs, the worst damage being to the sighting system.

He was also responsible for proposing a plan of having a sighting tube mounted ecliptically in order for the better observation of celestial latitudes.

Being the head official for the Bureau of Astronomy, Shen Kuo was an avid scholar of astronomy, and improved the designs of several astronomical instruments: the gnomon, armillary sphere, clepsydra clock, and sighting tube fixed to observe the pole star indefinitely.

On August 21, 2004, both the Nantucket Inquirer and Nantucket Mirror newspapers reported a " possible sighting " of Amer at the Nantucket Memorial Airport, and his photo was distributed to local security and transit workers.