6
3.1.3. Placing the PEA pair for two-beam sounding
In case of two-beam scanning, the wetted PEAs should be mount-
ed on the CP along two chords. The CP should be mounted so that the
chords are directed horizontally (Fig.3).
PEA1.1-PEA1.2 pair
– 1st beam
PEA2.1-PEA2.2 pair
– 2nd beam
Fig.3. Placing the PEA pairs
“on chords” (single-beam sounding).
3.1.4. Placing the PEA for four-beam scanning
In case of four-beam scanning, the PEA pairs are mounted on the
CP along four chords placed horizontally (Fig.4). The order of beams
can be reverse.
PEA1.1-PEA1.2 pair
– 1st beam
PEA2.1-PEA2.2 pair
– 2nd beam
PEA3.1-PEA3.3 pair
– 3rd beam
PEA4.1-PEA4.2 pair
– 4th beam
Fig.4. Placing the PEA pairs
“on chords” (four-beam sounding).
