BlueChart g3 charts feature depth curves every 30cm (1ft) for a more detailed representation of bottom structure on the Enhanced Fish Chart

you can store up to two million acres of maps with 1-foot contours

rubber washer and o-rings

For those looking for a more compact solution

Håndliste RF 750x75mm Bimini BlueChart g3 charts feature depthHandrail in electropolished stainless steel The handrail can be mounted with a through bolt from below, or screwed on from above. If the railing is to be screwed on from the top, a disc with a screw is required. Disc with screw sold individually. Available in several lengths. 25 mm. Available in 2 variants with 45 or 90 inclination.