Before revision: Ice navigation vessels are typically used for navigation in ice regions, where additional hull strengthening and other design elements ensure operation in areas of high ice concentration.The Ice Navigation Manual, Witherby Publishing Group, p. 185–212 Areas of ice navigation Ice navigation occurs wherever a waterborne vessel transits through sea ice.
After revision: Ice strengthened vessels are typically used for navigation in ice regions, where additional hull strengthening and other design elements ensure operation in areas of high ice concentration.The Ice Navigation Manual, Witherby Publishing Group, p. 185–212 Areas of ice navigation Ice navigation occurs wherever a waterborne vessel transits through sea ice.