Periscope
Approximately 10 of an iceberg is typically visible above the water's surface.
above the water
The upper surface of water is called the water's surface or water level. It is the boundary where the water meets the air above it.
Water is stored above the surface in bodies of water such as lakes, rivers, and ponds. Below the surface, water is stored in groundwater aquifers, which are underground layers of rock or sediment that hold water.
The antonym for groundwater is surface water, which refers to water that is above ground in rivers, streams, lakes, and oceans.
Water piles up above a container's rim due to surface tension, which is the cohesive force that water molecules exert on each other at the surface. This surface tension causes the water to form a convex meniscus, creating a slight bulge or pile-up above the container's rim.
A seamount.
The term used to describe the anchor buoy when it is floating on the surface above the anchor is "marker buoy" or simply "buoy." This device is used to indicate the location of the anchor underwater, making it easier for boaters to retrieve the anchor or to mark a specific spot in the water.
On average, about 10% of an iceberg is above the surface, while the rest (90%) is below the surface. The amount visible above the water depends on factors like the iceberg's shape, density, and buoyancy.
Water vaporizes only on the surface of the the water when it evaporates. When water boils, vaporization takes place both above and below the surface
Approximately 90% of an iceberg's mass is underwater, with only about 10% visible above the surface. This is due to the lower density of ice compared to water. So, the majority of an iceberg is hidden beneath the water's surface.
The Mid-Atlantic Ridge comes up above the surface of the water to form the island Iceland.