Forming Triangular Prismatic for SPM Interior Compartment in MOSES

Dear Sir/Madam,

Currently, I'm working on creating a hexagonal Single Point Mooring model in MOSES EDITOR. I need to form the compartment model inside the SPM.

Since the SPM has a hexagonal form, thus the compartment has to be a Triangular Prismatic as you can see in the attached figure below. I found it difficult to create the triangularly prismatic form if I use plane command.

Is there any alternative method that can be used for this work?

Thank you in advance.

Here's the example of my build up command:

&dimen -save -dimen Meters M-Tons
&describe body COBAPRISMA
&describe Body Tank001
pgen -PERM -1 -PORT -LOC 0.00 0.00 0.00 -diftype NONE
plane 0 -cart 0.00 0.00 3.474 0.00 3.474 5.641
plane 6.0040 -cart 0.00 0.00 0.000 0.00 0.000 5.641
end pgen
&describe Body Tank002
pgen -Perm -1 -LOC 0.00 -3.474 0.00 -diftype NONE
PLANE 0 -cart 0.00 0.00 0.000 0.00 0.000 5.641
plane 6.004 -cart 0.00 0.00 3.474 0.00 3.474 5.641
end_pgen

SPM Model

spm drawing

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