It's so these tools will make sound when it approaches the black boxes, according to the commission at the team's locator, or WAAS damage on their hoping that this help from the Singapore This locator will help with the search.
是以這些工具會在接近黑匣子時發出聲音,據委在團隊的定位器,或WAAS損害上他們希望新加坡這個定位器的幫助將有助於搜索。