Raymarine LIGHTHOUSE 3, Advanced Operation Instructions

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Expanding square search pattern
The Expanding Square search pattern is an outwards spiralling square pattern, and is particularly
suited to very detailed and methodical searches.
Note:
The Search patterns take drift into account, and therefore the resulting route may not resemble
the patterns shown.
Creating an expanding square search pattern
To create a Expanding Square search pattern follow the steps below:
1. Set Commence Search Point (CSP)
i. Manually input the CSP coordinates; a Range and Bearing are displayed to direct your vessel
towards it.
ii. Alternatively, set the CSP as your vessel’s current location by selecting the
(1)
CSP Shortcut
button.
2. Set Drift
i. Drop the Datum Marker in the water and select Marker dropped .
ii. Wait for the Datum Marker to drift through the water.
Chart app
179