A compass is a navigational instrument that measures directions in a frame of reference that is stationary relative to the surface of the earth. The frame of reference defines the four cardinal directions (or points) – north, south, east, and west. Intermediate directions are also defined. Usually, a diagram called a compass rose, which shows the directions (with their names usually abbreviated to initials), is marked on the compass. When the compass is in use, the rose is aligned with the real directions in the frame of reference, so, for example, the "N" mark on the rose really points to the north. Frequently, in addition to the rose or sometimes instead of it, angle markings in degrees are shown on the compass. North corresponds to zero degrees, and the angles increase clockwise, so east is 90 degrees, south is 180, and west is 270. These numbers allow the compass to show azimuths or bearings, which are commonly stated in this notation.

There are two widely used and radically different types of compass. The magnetic compass contains a magnet that interacts with the earth's magnetic field and aligns itself to point to the magnetic poles. The gyrocompass (sometimes spelled with a hyphen, or as one word) contains a rapidly spinning wheel whose rotation interacts dynamically with the rotation of the earth so as to make the wheel precess, losing energy to friction until its axis of rotation is parallel with the earth's.

Adidja Palmer (born 7 January 1976)- better known as Vybz Kartel, is a Jamaican dancehall artist, songwriter and businessman. He has many nicknames, including: Addi, The Teacher, World Boss, Kartel, Vybz, Gaza General and Gaza Don.

Adidja Palmer began his career as a teenager in 1993 with his first recording "Love Fat Woman", released on Alvin Reid's label "One Heart", using the moniker "Adi Banton", a homage to Buju Banton. Palmer was later part of the three-member group "Vybez Cartel", keeping the slightly altered name after group split up, and became a protege of Bounty Killer, for whom he claims to have written nearly 30 songs, including "Gal Clown".

Vybz Kartel rose to prominence in 2003 after a string of hits in Jamaica. The year culminated in a pre-planned on-stage clash with Ninjaman at the annual dancehall festival Sting in Kartel's hometown of Portmore. The clash turned violent when Kartel's crewmembers, as well as Kartel himself, threw punches and assaulted Ninjaman onstage. While Kartel's manager initially blamed Ninjaman for the fracas, Kartel himself quickly apologised to Ninjaman and Sting organizers for the fracas. Four days after the incident, the two artists appeared before the press to announce a settlement of their differences and to end any animosity.