| ECHOSOUNDER | Means of determining depth at sea (4,7) |
| RADIOCARBON | ___ dating (method of determining the age of an organic object) |
| CALCULATION | Act of determining the answer to an arithmetical expression (11) |
| FATHOM | Measure of depth at sea (6) |
| RADAR | The means of determining the presence of an object |
| EUREKA | From "I have found", Archimedes' legendary triumphant cry on discovering the means of determining by specific gravity the proportion of base metal in Hiero's golden crown, hence a word for a brilliant |
| TEST | Means of determining proficiency |
| ECHOLOCATION | Means of determining an object's position (12) |
| GOLDENHIND | Drake, or hen sadly in depth, at sea in this! (6,4) |
| SPATIAL | Spring connected with tides losing depth at first in 3-D |
| ADDON | Extra depth at first in a river |
| RIVER | Flowing water in golf club lacking depth at first (5) |
| FENGSHUI | The Chinese art of determining the most propitious design and arrangement of a building, room, etc (4,4) |
| OXIMETRY | Method of determining oxygen in blood |
| HEFTED | Lifted for the purpose of determining weight |
| MEANSTEST | Cruel nasty set have street method of determining wealth (5,4) |
| MIDWATER | Depth at which to catch wary carp on a zig rig? (*it warmed) (3-5) |
| TURINGTEST | Method of determining whether a machine can demonstrate human intelligence, named after its inventor (6,4) |
| RANGEFINDER | Instrument for determining the distance of an object (11) |
| POSTMORTEMS | Medical examinations determining cause of death (11) |
