No. A ferry timetable is not enough on its own to plan an island transfer. It can identify the planned sailing, but the cited travel guidance says to check service status before travel for the latest sailing information.
How to check the sailing
The check has two parts: use the timetable to identify the scheduled service, then consult the service-status information for the relevant route. The status pages provide detailed information on the current journey status of each route, adding information that the planned schedule alone does not establish.
Travellers should therefore check both before treating the crossing as workable.
What remains unconfirmed
The cited guidance does not state whether the timetable or status pages also cover onward connections, expected arrival times, weather restrictions, luggage, vehicle space, accessibility, disruption recovery, booking changes, or refund conditions. Those details remain unverified and must be confirmed through the relevant booking or travel arrangements.
A timetable is therefore only one part of island-transfer planning. The latest route status and the remaining arrival details both need separate checks.