How to Identify your Gebo Hatch

Gebo hatches have been made in three series:
  • Standard Series, with or without a flange
  • Flushline Series
  • Airlock Series, which has been discontinued

Some definitions before we get started

What is the "Flange"?

The flange is the part of the hatch frame that drops into the deck cutout. It extends below the surface of the deck.

Flushline Series

The easiest way to identify a Flushline hatch is by its hinges. Flushline hinges have larger end caps than Standard Series hinges.

Flushline Series Hinge Identification

A Flushline hatch has a 25 mm (0.98 in) flange. This is much deeper than the flange used on a Standard Series hatch.

Flushline Series Dimensions

Standard Series

Standard Series hatches have smaller hinge end caps than Flushline hatches.

Standard Series Hinge Identification

Standard Series hatches were made both with and without a flange. Once you have identified the hatch as a Standard Series, you still need to determine which version you have.

Standard Series with flange

The flanged version has a small 3 mm (0.12 in) flange extending into the deck cutout.

Its default cutout corner radius is 55 mm (2.17 in).

Standard Series with Flange Dimensions

Standard Series without flange

The version without a flange does not extend down into the deck cutout.

Its default cutout corner radius is 30 mm (1.18 in).

Standard Series without Flange Dimensions

The difference in corner radius matters when ordering a replacement. A hatch with the right length and width but the wrong radius will not fit the existing cutout correctly.

These are the standard factory radii. A small number of custom hatches have been made with other radii, so measure the actual cutout whenever there is any doubt.

Airlock Series

The Airlock Series has been discontinued. It can be identified by its handles and hinges, which look different from the hardware used on current Standard and Flushline hatches.

Airlock hinges

Also, the Airlock series has an older style handle and handle catch

Airlock Handle Catch

If an Airlock hatch needs to be replaced, a current Standard Series hatch will fit the same cutout size.

The Standard Series frame has a slightly smaller footprint on top of the deck. Depending on the original installation, this may expose old fastener holes, bedding marks or unfinished deck surface. Plan on some deck preparation if you want the replacement to have a clean, professional finish.

Still not sure which hatch you have?

Take clear photos of:
  • The hinges, including the end caps
  • The handles from inside the boat
  • The hatch from above
  • The frame where it enters the deck cutout

Also measure the cutout length, width and corner radius. These details are usually enough to identify the series and select the correct replacement or service parts. Please email us at info@gebousa.com. 

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