Map sheet number 373 in the OS Explorer series covers the west coast of the Isle of Mull & Island of Iona. Highlights of the area include: Loch na Keal National Scenic area, Knockan & Fionnphort. With this map you will receive a code for use on your i OS or Android smartphone or tablet. Find our more at Mobile Download FAQ. The OS Explorer map for Iona, Staffa & Ross of Mull is available in both the standard paper version & weatherproof ' Active' version.