Abstract: An inspection port is provided for allowing inspection of an insulated tanker. The insulated tanker may include a tank shell configured for containing a fluid, and a jacket disposed at least partially around, and spaced from, the tank shell to define a volume between the tank shell and the jacket. An insulation layer may be disposed between the tank shell and the jacket. An inspection port may include an opening formed in the jacket. The inspection port may provide access to at least a portion of an exterior of the tank shell. A cover plate may be disposed over the inspection port, and may be mechanically fastened relative to the jacket.