If you want to snap all the vertices of the rim to the surface at once, you could assign them to a Vertex Group, temporarily P split the hatch off into a separate object, and give it a Shrinkwrap modifier, affecting only the vertex group, targeted on the surface.
If you align the hatch object-axes of the hatch down the edge of interest,then you can use the modifier to project all the vertices in the desired direction. Apply the modifier, rejoin the objects.
If you want to snap all the vertices of the rim to the surface at once, you could assign them to a Vertex Group, temporarily P split the hatch off into a separate object, and give it a Shrinkwrap modifier, affecting only the vertex group, targeted on the surface.
If you align the object-axes of the hatch down the edge of interest,then you can use the modifier to project all the vertices in the desired direction. Apply the modifier, rejoin the objects.
If you want to snap all the vertices of the rim to the surface at once, you could assign them to a Vertex Group, temporarily P split the hatch off into a separate object, and give it a Shrinkwrap modifier, affecting only the vertex group, targeted on the surface.
If you align the hatch object-axes down the edge of interest,then you can use the modifier to project all the vertices in the desired direction. Apply the modifier, rejoin the objects.
If you want to snap all the vertices of the rim to the surface at once, you could assign them to a Vertex Group, temporarily P split the hatch off into a separate object, and give it a Shrinkwrap modifier, affecting only the vertex group, targeted on the surface.
If you align the object-axes of the hatch down the edge of interest,then you can use the modifier to project all the vertices in the desired direction. Apply the modifier, rejoin the objects.
If you want to snap all the vertices of the rim to the surface at once, you could assign them to a Vertex Group, temporarily P split the hatch off into a separate object, and give it a Shrinkwrap modifier, affecting only the vertex group, targeted on the surface.
If you align the object-axes of the hatch down the edge of interest,then you can use the modifier to project all the vertices in the desired direction. Apply the modifier, rejoin the objects.
If you want to snap all the vertices of the rim to the surface at once, you could assign them to a Vertex Group, temporarily P split the hatch off into a separate object, and give it a Shrinkwrap modifier, affecting only the vertex group, targeted on the surface.
If you align the object-axes of the hatch down the edge of interest,then you can use the modifier to project all the vertices in the desired direction. Apply the modifier, rejoin the objects.
