There are times when the elevation difference between the hook and the deck may not allow for a scan at 50ft above the deck.
In this case, the distance between radials (crane swings) should be reduced by 5ft for every 10ft of reduced scan elevation:
| Scan Elevation (ft) | Distance Between Radials (ft) |
|---|---|
| 50 | 25 |
| 40 | 20 |
| 30 | 15 |
| 20 | 10 |