Magellan GLOBAL SATELLITE TELEPHONE - Manual (Page 103)

WorldPhone – Chapter 5. Appendices B-1
Appendix B – Installation of Marine Antenna
Location of Antenna Unit
Avoid obstructions
The Antenna ideally requires a free line of sight in all directions above
an elevation angle of 5 degrees.
Any obstruction will cause blind sectors, and may result in degrada-
tion or even loss of communication with the satellite.
Degrading of the communication is only completely avoided by plac-
ing the antenna higher than any obstructions. This is often not feasi-
ble and a compromise must be made to reduce the number of blind
sectors.
The degree of communication degradation depends on the size of the
obstructions; the distance to them must therefore be considered.
Preferably, all obstructions within 3 m of the antenna should be
avoided. Obstructions less than 15 cm in diameter can be ignored
beyond this distance.
Installation of Antenna Unit on top of mast must be avoided.
Compass safe distance
For installation on Norwegian or British vessels, the Antenna Unit
should be located at a distance of at least 1.0 metre from the mag-
netic steering compass. Be aware that requirements may vary from
one country to another.
Radiation precautions
Persons should not be near the antenna when transmitting for periods
of more than 1 hour per day.
MICROWAVE RADIATION !
NO ADMITTANCE WITHIN 1 M
Installation of Marine Antenna Appendix B
Installation of Marine Antenna