Villagers steer their boat passing a forest fire in Galang, on Batam island bordering Singapore, 18 October 2006. Indonesia is upgrading instrument landing systems at airports hit by haze from land-clearing fires on the islands of Borneo and Sumatra in a bid to improve safety, an official said. The haze is an annual problem, triggered by plantations and farmers burning their fields ahead of the planting season. Pollution from the fires typically spreads to Singapore and Malaysia, irking governments there.