Theoretically, you wouldn't have any rounding issues as all datasets have foru decimal places and simple add/subtract operations won't change the number of significant decimal places.
However, since the numbers are displayed in binary fashion, you incur +/- EPS in precision for each number. EPS is the smallest number that can be expressed in the number format used. EPS for integers is e.g. 1. So, even add/subtract introduce very small round-off errors whcih should be in the order of maybe 1E-16. I would not expect to see round-off errors in the fourth digit.
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There are two types of vessels, submarines and targets.
