isobath
/ˈaɪsəˌbæθ/
noun
- A line on a map or chart that connects points of equal depth underwater, such as in a lake, sea, or ocean.
- Sailors use isobaths to avoid shallow areas that could damage their boats.
- The map of the lake includes isobaths to show where the water is deepest.
- The isobath at 100 meters runs close to the coast, indicating a steep drop-off.
Synonyms