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 A misnomer indicating the resultant direction from a point of departure to a point of arrival at any given time.

## Related Terms

The single resultant direction from a point of departure to a point of arrival at any given time. The use of this term to indicate a single resultant direction is preferred to the use of the misnomer course made good.

### RHUMB-LINE COURSE

The direction of the rhumb line from the point of departure to the destination, expressed as the angular distance from a reference direction, usually north. Also called MERCATOR COURSE.

### VESSEL MANIFEST

An international carrier is obliged to declare of the ship's crew and contents at the port of departure and arrival in this document.

### LOCAL VERTICAL

The direction of the acceleration of gravity as opposed to the normal to the reference ellipsoid. It is in the direction of the resultant of the gravitational and centrifugal accelerations of the earth at the location of the observer. Also called PLUMB-BOB VERTICAL.

A pattern of tungsten blocks that absorb gamma-ray photons in a gamma-ray telescope, and are arranged so that an astronomical gamma-ray source projects on a position sensitive detector a pattern that is characteristic of the direction of arrival of the photons.

### ANOMALY

1. Departure from the strict characteristics of the type, pattern, scheme, etc. 2. An angle used in the mathematical description of the orbit of one body about another. It is the angle between the radius vector of the body and the line of apsides and is measured from pericenter in the direction of motion. When the radius vector is from the center of the primary to the orbiting body, the angle is called true anomaly. When the radius vector is from the center of the primary to a fictitious body moving with a uniform angular velocity in such a way that its period is equal to that of the actual body, the angle is called mean anomaly. When the radius vector is from the center of the elliptical orbit to the point of intersection of the circle defined by the semimajor axis with the line perpendicular to the semimajor axis and passing through the orbiting body, the angle is called eccentric anomaly or eccentric angle. 3. Departure of the local mean value of a meteorological element from the mean value for the latitude.

### PORTLOG

A statement concerning a vessel documenting the actual arrival and departure time used tugs, draft, dead- weight, quantity of discharged and loaded goods/containers and any other important particulars. It is like a statement of fact but usually used when the cargo is booked on liner terms where the owner has control over the loading and discharge and there is no Laytime involved. It is usually not signed.

### TURNAROUND TIME

The time it takes between the arrival of a vessel and its departure from port; frequently used as a measure of port efficiency.

### COMPOSITE TRACK

A modified great-circle track consisting of an initial great circle track from the point of departure with its vertex on a limiting parallel of latitude, a parallel-sailing track from this vertex along the limiting parallel to the vertex of a final great-circle track to the destination.

### GREAT CIRCLE COURSE

The direction of the great circle through the point of departure and the destination, expressed as the angular distance from a reference direction, usually north, to the direction of the great circle. The angle varies from point to point along the great circle. At the point of departure it is called initial great circle course; at the destination it is called final great circle course.

### Related questions

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