Using the Sonarmite/HydroLite-TM in the field
The HydroLite-TM Pole Kit makes mounting the Sonarmite Echosounder very easy. The
YouTube setup video will show you how to assemble the HydroLite-TM pole kit. I would
suggest buying the transducer mounting bracket at the very least.
http://www.youtube.com/watch?v=lwIeobCUxJ4
1.
After you have assembled the HydroLite system, you will need to find the best
location to mount on your craft. Over the side is usually preferred. Aero ration
from the engine in the rear can disrupt soundings. The transducer should be the
lowest point of the vessel. When measuring the rod height off-set you would start
at the bottom of the transducer.
2.
You want the pole as straight as possible; this may change when the operator or
passengers are on the boat. It’s always good policy to note the draft of the
transducer.
3.
Usual survey speed is between two and four mph, the slower you go the more
soundings you will log. Surveying in a grid format is the best way to ensure proper
coverage of the survey area.
F.A.Q
Is Dual Frequency required ?
Dual frequency echo sounders were originally designed for use by sea going
vessels to give reliable depths in deep water situations (low frequency) and
more accurate navigation within shallow areas (high frequency). Low frequency
is of little use in shallow hydrographic surveys
• Physical accuracy is outside IHO specifications
• Power consumption prohibits true portable use
• Minimum depth possible outside survey requirements
Can mud thickness can be measured with Dual Frequency ?
The residual difference between low and high frequency shown on an
echogram gives the impression that mud thickness can be measured. In fact the
trace does give an impression of soft sediment, however, in most sounders this is
just the difference in reflected energy as a result of simple penetration of higher
power low frequency signals plotted against the low power high frequency
