3-9
3.9 Installing Optional Equipment
This sub section describes how to install some of the 4125 optional equipment. Users that do not have
these options, or do not wish to configure their towfish with them at this time, can proceed to sub-section
3.10: CONNECTING THE SYSTEM COMPONENTS.
3.9.1 Installing the Hull Scan Kit
The following subsections describes how to install the inverted horizontal and vertical hull scan brackets
for the 4125 towfish as described in sub-section 1.7.3):
1. Remove existing tow arm and recovery cable.
2. Attach bracket to tapped holes on bottom of towfish for horizontal (inverted) hull scanning
(FIGURE 3-5), or to the holes above the transducer for vertical hull scanning (FIGURE 3-6). The
bracket is engraved with the words “tail and nose” to indicate how the bracket should be oriented.
Figure 3-5: Horizontal (Inverted) Hull Scan Bracket Attached