Attach ballast weights to the floor of your model ​ — such as a few evenly spaced coins held in place with tape or glue — ​ until it floats with between a third and a half of its height under water.
Pirms modelis ir līdz galam salīmēts, pie tā grīdas piestipriniet balastu, piemēram, dažas vienmērīgi izvietotas monētas, ko var pielīmēt ar līmlenti vai līmi.