The Question and Answer section for Gulliver’s Travels is a great resource to ask questions, find answers, and discuss the novel.
The emperor wants to show Gulliver his "amazing empire". He also finds Gulliver to be a novelty and perhaps a formidable weapon.
The Lilliputians fasten Gulliver to ground with ropes tied around his arms and legs. They also tie his hair down in the same way. The Lilliputians are armed with bows and arrows.
While sailing in the West Indies, the Antelope encounters a massive storm and the ship ends up Northwest of "Van Diemen's Land" or Tasmania. Harsh waters make it difficult to anchor.