Every Friday MBM uploads two near-identical pictures. Your job? To spot the 10 differences between them.

Last week we presented you with two pictures of Marino's all purpose boat , tested in November's issue, out 15 October. You can see the solution as a pdf , or in our spot the difference gallery .

This week's two pictures are of the Seafarer 5 echo sounder. See the pictures as a downloadable PDF or in our spot the difference gallery .

Check back next Friday for the results.