Travel is how far the transducer drops below the bottom of the tank when you lower it. Furuno offers both omni models with 400 mm (about 15.7 in) or 600 mm (about 23.6 in) of travel. The hoists cost the same at MSRP: $9,265 for the CSH-10 and $5,175 for the CSH-8L MK2. So the choice is about the hull, not the price.
The rule of thumb
As explained at a dealer round table reported by InTheBite, 400 mm is typically used when the tank is installed in the keel, and 600 mm when the tank sits off the center of the keel and the transducer has to reach farther down to get clear of it. A keel between the transducer and part of the circle blocks the sound on that side.
The trade-offs
| 400 mm | 600 mm | |
|---|---|---|
| Typical tank position | In the keel | Off the keel centerline |
| CSH-10 raise / lower time | 7 s | 10 s |
| CSH-10 hull unit weight | 81 kg (CSH-103) | 87 kg (CSH-104) |
| Hoist MSRP, CSH-10 | $9,265 | $9,265 |
Faster boats
For boats capable of 25 knots or more, Furuno calls for a fin in front of the tank. On small FRP hulls there's an optional fairing. Either changes water flow around the transducer, so decide on it with your installer when you choose travel.
If you're upgrading from a CSH-8L MK2, the tube stays. The CSH-10 needs its own hoist, so it's a good moment to check that the travel you have is still the right one.
Published 2026-10-31. Sources: Furuno CSH-10 and CSH-8L MARK-2 brochures, Furuno USA product pages, InTheBite, Yachting and Power & Motoryacht.