All Ships; Pos Request; Pos Report - Simrad RS20S User Manual

All ships

Used to place a call to ALL DSC equiped vessels in range, much like
a distress call. The nature of the call must be selected, and can be
either SAFETY or URGENCY.
When the SEND TO page is displayed, turn the channel knob to
select the channel to use for voice communication.
Call logs
Shows a record of SENT, RECEIVED, and DISTRESS calls.

POS request

Used to send a postion request to another vessel. The call can
be initiated by selected an existing vessel in the CONTACTS, by
entering in a new vessel's MMSI (MANUAL), or by selecting a vessel
in the RECENT list.
As no voice communication is required, no option is given to select
a ship-ship channel.

POS report

Used to send a position report to the vessel being called.
DSC test
Used to place a TEST call to a single other vessel. The call can
be initiated by selected an existing vessel in the CONTACTS, by
entering in a new vessel's MMSI (MANUAL), or by selecting a vessel
in the RECENT list.
Comms channel selection is not possible.
MMSI/GPS
Shows entered MMSI number and GPS fix information.
DSC call menu | RS20S User Guide