6. CHART OVERVIEW
6-3
What is ENC delivery?
ENCs can be distributed as ENC delivery or SENC (C-MAP) delivery. Both deliveries
can be used in this system.
In ENC delivery, charts are distributed directly from source like PRIMAR, IC-ENC,
JHA, etc. They are delivered onboard in ENC format (using S-57 and S-63) then the
charts are installed into the system.
In SENC delivery, charts are converted from ENC to SENC before delivery to onboard
and then installed into the system. A C-MAP delivery is SENC delivery.
Important notices
• If you are using both services (ENC and SENC deliveries) having the same chart
name installed into the system through both deliveries, priority of displaying the
chart is in ENC delivery.
• Chart updates for ENC delivery are only for charts of ENC delivery and chart up-
dates for SENC delivery is only for charts of SENC delivery. You have to keep
charts up-to-date separately.
• If you change from ENC delivery to SENC delivery, remove old charts from the sys-
tem before installing charts from new delivery.
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