Two of Vietnam's 100-metre-(330-ft-) long Russian-built missile-guided frigates docked in Manila Bay at the start of a three-day goodwill visit on November 25, 2014. The Russian-built warships are equipped with stealth technology to display a minimal profile on enemy radar screens. They have anti-ship missiles and anti-submarine warfare helicopters.  A Philippine naval official said "We are trying to hold joint patrols and operations in the Spratlys, including search-and-rescue operations. We are not trying to challenge China's naval superiority in the disputed area. We have no intention to heighten any tension. These are peaceful activities, like sharing of experiences and best practices."