| What is the arrangement of a shaft tunnel as fitted on a single-screw vessel? |
| A) The shaft tunnel is situated on the centerline of the vessel with walkways positioned on either side of the shaft and any piping runs carried underneath the two walkways. |
| B) The shaft tunnel is offset from centerline of the vessel with a walkway positioned on one side of the shaft any piping runs carried overhead above the shaft. |
| C) The shaft tunnel is offset from centerline of the vessel with a walkway positioned on one side of the shaft any piping runs carried underneath the walkway. |
| D) The shaft tunnel is situated on the centerline of the vessel with walkways positioned on either side of the shaft and any piping runs carried overhead above the shaft. |
