What form of transport is so big that 400 people could play tennis on it at the same time?

What form of transport is so big that 400 people could play tennis on it at the same time?Oil tankers, the biggest ships, are so large that their decks could accommodate a hundred tennis courts each with four players.

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Ganga Mahotsav: Varanasi, Uttar Pradesh

Ganga Mahotsav: Varanasi, Uttar Pradesh 5 Day Cultural Festival

Ganga Mahotsav is a five day event celebrated on the banks of the river Ganges …