How to Identify your Gebo Hatch
- 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.
A Flushline hatch has a 25 mm (0.98 in) flange. This is much deeper than the flange used on a Standard Series hatch.
Shop Flushline Hatch Parts
Shop Flushline Hatches
Standard Series
Standard Series hatches have smaller hinge end caps than Flushline hatches.
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).
Shop Standard Series Hatch Parts
Shop Standard Series Hatches with Flange
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).
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.
Shop Standard Series Hatch Parts
Shop Standard Series Hatches without Flange
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.
Also, the Airlock series has an older style handle and handle catch
The replacement for an Airlock hatch is a Standard Series hatch with flange in the matching cutout size. This version has a default cutout corner radius of 55 mm (2.17 in). Measure your existing cutout length, width and corner radius before ordering, especially if your boat may have a custom hatch.
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.
Shop Standard Series Hatches with Flange
How to find your hatch size
Gebo model sizes are based on the cutout size: the hole in the deck that the hatch fits into. Once the hatch is installed, the easiest way to identify its size is to measure the overall frame.
- Measure the length and width from the outermost edge of the hatch frame to the outermost edge on the opposite side. Measure the frame itself, excluding any hinges or handles that stick out.
- Find the correct series on the Gebo USA website and compare your measurements with the dimensions labeled “Overall.” The cutout dimensions will be smaller than the overall frame dimensions.
For Standard Series hatches, make sure you are comparing the correct version: with or without a flange. If the measurements do not match, send us a photo with the tape measure in place and we can help.
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
Include the overall length and width of the hatch frame, measured as described above. These details will help us identify the series and model. If you are replacing the whole hatch, we may also need to confirm the cutout dimensions and corner radius. Please email us at info@gebousa.com.