Use this template to add a little padding before a superscript so that it doesn't clash with adjacent – and especially italic – text:
{{isup|text to superscript}}
for the default padding;{{isup|N_units|text to superscript}}
or, using another shortcut, {{padlsup|N_units|text to superscript}}
[[SS Kroonland|SS ''Kroonland'']]{{i sup|2}}
produces: SS Kroonland2[[SS Kroonland|SS ''Kroonland'']]<sup>2</sup>
produces: SS Kroonland2