---
title: "manager(_:didUpdate:)"
framework: coremotion
role: symbol
role_heading: Instance Method
path: "coremotion/cmwatersubmersionmanagerdelegate/manager(_:didupdate:)-7nhjb"
---

# manager(_:didUpdate:)

Provides the delegate with a new set of pressure and depth measurements.

## Declaration

```swift
optional func manager(_ manager: CMWaterSubmersionManager, didUpdate measurement: CMWaterSubmersionMeasurement)
```

## Parameters

- `manager`: The manager for water submersion data.
- `measurement`: A data object that contains information about the pressure and depth.

## Discussion

Discussion Implement this method to receive updated surface pressure, water pressure, and depth data. The system sends measurement updates three times a second while submerged. When on the surface, the system provides updates at a slower rate, and may stop providing updates if the device isn’t moving. nonisolated func manager(_ manager: CMWaterSubmersionManager, didUpdate measurement: CMWaterSubmersionMeasurement) {

logger.info("*** Received a depth measurement ***")

let currentDepth: String     if let depth = measurement.depth {         currentDepth = "\(depth.value) \(depth.unit)"     } else {         currentDepth = "None"     }

let currentSurfacePressure: String     let surfacePressure = measurement.surfacePressure     currentSurfacePressure = "\(surfacePressure.value) \(surfacePressure.unit)"

let currentPressure: String     if let pressure = measurement.pressure {         currentPressure = "\(pressure.value) \(pressure.unit)"     } else {         currentPressure = "None"     }

logger.info("*** Depth: \(currentDepth) ***")     logger.info("*** Surface Pressure: \(currentSurfacePressure) ***")     logger.info("*** Pressure: \(currentPressure) ***")

let submerged: Bool?     switch measurement.submersionState {     case .unknown:         logger.info("*** Unknown Depth ***")         submerged = nil     case .notSubmerged:         logger.info("*** Not Submerged ***")         submerged = false     case .submergedShallow:         logger.info("*** Shallow Depth ***")         submerged = true     case .submergedDeep:         logger.info("*** Deep Depth ***")         submerged = true     case .approachingMaxDepth:         logger.info("*** Approaching Max Depth ***")         submerged = true     case .pastMaxDepth:         logger.info("*** Past Max Depth ***")         submerged = true     case .sensorDepthError:         logger.info("*** A depth error has occurred. ***")         submerged = nil     @unknown default:         fatalError("*** An unknown measurement depth state: \(measurement.submersionState)")     }

Task {         await myAdd(measurement: measurement)         if let submerged {             await mySet(submerged: submerged)         }     } }

## See Also

### Receiving updates

- [manager(_:didUpdate:)](coremotion/cmwatersubmersionmanagerdelegate/manager(_:didupdate:)-6qux6.md)
- [manager(_:didUpdate:)](coremotion/cmwatersubmersionmanagerdelegate/manager(_:didupdate:)-18wua.md)
- [manager(_:errorOccurred:)](coremotion/cmwatersubmersionmanagerdelegate/manager(_:erroroccurred:).md)