Japanese to English Tech/Engineering Electronics / Elect Eng

Magnetic locator (for transit survey and confirmation survey)
Title in Ja;anise:（マグネチックロケーター（経層探査・確認探査用））
Trak100
Output: Sensitivity volume control
Sensitivity switching: L to H
Iron core used: PC permalloy
Operating temperature: -10°C to 50°C
Power supply: 6 V x 6
Outer dimensions: 80 (W) X 150 (H) x 1080 (L) mm
Weight: 1.5 kg

In the above can 経層探査 be translated as transit survey or transverse layer survey?
Please help! Thank you.