Keel tank decommissioning

[captarno]

I have decommissioned the 2 diesel tanks in the aft part of the keel. Need ideas how to fill/treat the voids. Any simple suggestions please.

[bil56]

why have you decommissioned the tanks?
why do you want to fill them?
cut off the top, clean, protect, use for storage ...

[captarno]

Don’t like the idea of fuel under the waterline & the need to pump up the fuel? I could use the area for storage, never though of that. Thanks for the feedback!