Will my SouthESIM have internet on international ferry crossings?

When embarking on international ferry journeys, like crossing the Strait of Gibraltar between Spain and Morocco, or traveling from Singapore to nearby Indonesian islands, you can expect strong signal at the departure and arrival ports. However, as the ferry moves into open international waters, especially away from land, the signal may become intermittent or drop entirely. Cellular coverage is primarily land-based, so enjoy the sea views and reconnect when you approach your destination.