Who are the most know "Marina Antennas" manufacturers?

Comrod A/S
Banten
Digital Antenna
Furuno USA
G.A.M. Electronics
Globalstar
Glomex Marine Antennas
JRC
KVH Industries
Metz Communication

What has to be considered if you buy an Marina Antenna

There are several things to be considered:

• Type of antenna (Length)
• Gain of the Antenna (As more the antenna can "roll"on the boat position, as less the gain should be.)
• SWR = Standing wave ratio

What means the "GAIN"

There is a simplified rule for the antenna range:

• If you have 3 db gain, you can transmit about 1,15 x the height of your an
• Gain of the Antenna (As more the antenna can "roll"on the boat position, as less the gain should be.
• Maximum gain is about 9dB

What to do to have a good transmission and receiption

There are some very simple rules:

• Keep the antenna and the antenna cable away from flurouscent
• Route the antenna cable at least 1m away from other radio antenna cables, deoth sounder transducers, other antennas
• Use only coaxial cable of good quality, like RG 213 or Aircell 7
• Do not extend cables if you don´t need to
• Do not coil coaxial cables, store it in a random jumble or a figure - eight to prevent magnetic anomlies