optional, single

—

Inside <built> the shipyard name, and the date of launching are given.

<wreck>

<launchingdate>, <shipyard>

<wreck>

<built>
    <shipyard>Blohm & Voss</shipyard>
    <launchingdate>
        <date>
            <year>1943</year>
            <month>6</month>
            <day>14</day>
            <dayofweek>1</dayofweek> <!-- Monday -->
        </date>
    </launchingdate>
</built>