A little comment on the challenge. The Mayan Number Converter basically consists of two transformations. Transformation #1 is the conversion of the Mayan symbols into a decimal number representation. Transformation #2 is a BASE20/BASE10 conversion between the Mayan vigesimal and the decimal numeral system.

A generic Base Converter is available in the UDF Section under BaseConverter() - for base2-base36 conversions
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There are two types of vessels, submarines and targets.