diff --git a/SF50 Shared/NOTAM/NOTAMLoader.swift b/SF50 Shared/NOTAM/NOTAMLoader.swift
index b4f053b..733ee0c 100644
--- a/SF50 Shared/NOTAM/NOTAMLoader.swift	
+++ b/SF50 Shared/NOTAM/NOTAMLoader.swift	
@@ -2,6 +2,22 @@ import Foundation
 import Logging
 import Sentry
 
+/// Abstracts NOTAM retrieval so callers can inject deterministic data — notably
+/// to keep UI tests off the network.
+public protocol NOTAMLoaderProtocol: Actor {
+  /// Fetches NOTAMs for an airport over an effective-date range.
+  /// - Parameters:
+  ///   - icao: The airport identifier to query.
+  ///   - startDate: Optional start of the effective-date filter.
+  ///   - endDate: Optional end of the effective-date filter.
+  /// - Returns: The matching NOTAMs.
+  func fetchNOTAMs(
+    for icao: String,
+    startDate: Date?,
+    endDate: Date?
+  ) async throws -> [NOTAMResponse]
+}
+
 /**
  * Actor responsible for fetching NOTAM data from the NOTAM API.
  *
@@ -42,7 +58,7 @@ import Sentry
  * }
  * ```
  */
-public actor NOTAMLoader {
+public actor NOTAMLoader: NOTAMLoaderProtocol {
   /// Shared singleton instance
   public static let shared = NOTAMLoader()
 
@@ -112,6 +128,27 @@ public actor NOTAMLoader {
     }
   }
 
+  /// Fetches NOTAMs for an airport over an effective-date range.
+  ///
+  /// Satisfies ``NOTAMLoaderProtocol`` by forwarding to
+  /// ``fetchNOTAMs(for:startDate:endDate:purpose:scope:limit:offset:)`` with
+  /// default filters and returning just the NOTAM entries.
+  public func fetchNOTAMs(
+    for icao: String,
+    startDate: Date?,
+    endDate: Date?
+  ) async throws -> [NOTAMResponse] {
+    try await fetchNOTAMs(
+      for: icao,
+      startDate: startDate,
+      endDate: endDate,
+      purpose: nil,
+      scope: nil,
+      limit: 100,
+      offset: 0
+    ).data
+  }
+
   /// Fetches NOTAMs for a specific ICAO location.
   ///
   /// - Parameters:
@@ -229,70 +266,6 @@ public actor NOTAMLoader {
     }
   }
 
-  /// Fetches a single NOTAM by its ID.
-  ///
-  /// - Parameter notamId: The NOTAM identifier (e.g., "FDC 2/1234")
-  /// - Returns: NOTAM response including raw message
-  /// - Throws: `NOTAMLoader.Errors` on failure
-  public func fetchNOTAM(id notamId: String) async throws -> NOTAMResponse {
-    // URL-encode the NOTAM ID
-    guard
-      let encodedId = notamId.addingPercentEncoding(withAllowedCharacters: .urlPathAllowed)
-    else {
-      throw Errors.invalidURL
-    }
-
-    guard let url = URL(string: "\(baseURL)/api/notams/\(encodedId)") else {
-      throw Errors.invalidURL
-    }
-
-    Self.logger.info("Fetching single NOTAM", metadata: ["notamId": "\(notamId)"])
-
-    // Create request with authentication
-    var request = URLRequest(url: url)
-    request.setValue("Bearer \(apiToken)", forHTTPHeaderField: "Authorization")
-    request.setValue("application/json", forHTTPHeaderField: "Accept")
-    request.timeoutInterval = 30
-
-    // Perform request
-    let (data, response) = try await session.data(for: request)
-
-    guard let httpResponse = response as? HTTPURLResponse else {
-      throw Errors.invalidResponse
-    }
-
-    // Handle errors
-    if httpResponse.statusCode != 200 {
-      if let errorResponse = try? decoder.decode(NOTAMErrorResponse.self, from: data) {
-        throw Errors.apiError(
-          statusCode: httpResponse.statusCode,
-          code: errorResponse.error.code,
-          message: errorResponse.error.message
-        )
-      }
-      throw Errors.badResponse(httpResponse)
-    }
-
-    // Decode response (single NOTAM endpoint returns { "data": {...} })
-    struct SingleNOTAMResponse: Decodable {
-      let data: NOTAMResponse
-    }
-
-    do {
-      let singleResponse = try decoder.decode(SingleNOTAMResponse.self, from: data)
-      Self.logger.info("Successfully fetched NOTAM", metadata: ["notamId": "\(notamId)"])
-      return singleResponse.data
-    } catch {
-      SentrySDK.capture(error: error) { scope in
-        scope.setLevel(.warning)
-        scope.setTag(value: notamId, key: "notam.id")
-        scope.setFingerprint(["notam-decoding"])
-      }
-      Self.logger.error("Failed to decode NOTAM response", metadata: ["error": "\(error)"])
-      throw Errors.decodingFailed(error)
-    }
-  }
-
   /// Errors that can occur during NOTAM loading
   public enum Errors: Error {
     /// Invalid URL construction
diff --git a/SF50 Shared/Performance/ViewModel/BasePerformanceViewModel.swift b/SF50 Shared/Performance/ViewModel/BasePerformanceViewModel.swift
index d8587fa..19def2d 100644
--- a/SF50 Shared/Performance/ViewModel/BasePerformanceViewModel.swift	
+++ b/SF50 Shared/Performance/ViewModel/BasePerformanceViewModel.swift	
@@ -43,6 +43,7 @@ open class BasePerformanceViewModel: WithIdentifiableError {
   private static let logger = Logger(label: "codes.tim.SF50-TOLD.BasePerformanceViewModel")
 
   private let container: ModelContainer
+  private let notamLoader: any NOTAMLoaderProtocol
   internal var model: PerformanceModel?
   private var cancellables: Set<Task<Void, Never>> = []
   private var notamObservationTask: Task<Void, Never>?
@@ -126,10 +127,12 @@ open class BasePerformanceViewModel: WithIdentifiableError {
   public init(
     container: ModelContainer,
     calculationService: PerformanceCalculationService = DefaultPerformanceCalculationService.shared,
+    notamLoader: (any NOTAMLoaderProtocol)? = nil,
     defaultFlapSetting: FlapSetting
   ) {
     self.container = container
     self.calculationService = calculationService
+    self.notamLoader = notamLoader ?? NOTAMLoader.shared
 
     // temporary values, overwritten by recalculate()
     model = nil
@@ -318,15 +321,15 @@ open class BasePerformanceViewModel: WithIdentifiableError {
       let endDate = Calendar.current.date(byAdding: .day, value: 30, to: plannedTime)
 
       // Try primary identifier first
-      var response = try await NOTAMLoader.shared.fetchNOTAMs(
+      var notams = try await notamLoader.fetchNOTAMs(
         for: primaryIdentifier,
         startDate: startDate,
         endDate: endDate
       )
 
       // If no results and we have a fallback identifier, try that
-      if response.data.isEmpty, let fallbackIdentifier, fallbackIdentifier != primaryIdentifier {
-        response = try await NOTAMLoader.shared.fetchNOTAMs(
+      if notams.isEmpty, let fallbackIdentifier, fallbackIdentifier != primaryIdentifier {
+        notams = try await notamLoader.fetchNOTAMs(
           for: fallbackIdentifier,
           startDate: startDate,
           endDate: endDate
@@ -337,10 +340,10 @@ open class BasePerformanceViewModel: WithIdentifiableError {
       await NOTAMCache.shared.invalidate(for: primaryIdentifier)
 
       // Cache the new results
-      await NOTAMCache.shared.set(response.data, for: primaryIdentifier)
+      await NOTAMCache.shared.set(notams, for: primaryIdentifier)
 
       // Filter for relevant NOTAMs
-      downloadedNOTAMs = filterNOTAMs(response.data, relativeTo: plannedTime)
+      downloadedNOTAMs = filterNOTAMs(notams, relativeTo: plannedTime)
 
       // Mark that we've attempted to fetch NOTAMs
       hasAttemptedNOTAMFetch = true
diff --git a/SF50 Shared/Performance/ViewModel/LandingPerformanceViewModel.swift b/SF50 Shared/Performance/ViewModel/LandingPerformanceViewModel.swift
index 6c816b8..1c048a9 100644
--- a/SF50 Shared/Performance/ViewModel/LandingPerformanceViewModel.swift	
+++ b/SF50 Shared/Performance/ViewModel/LandingPerformanceViewModel.swift	
@@ -78,7 +78,8 @@ public final class LandingPerformanceViewModel: BasePerformanceViewModel {
 
   public init(
     container: ModelContainer,
-    calculationService: PerformanceCalculationService = DefaultPerformanceCalculationService.shared
+    calculationService: PerformanceCalculationService = DefaultPerformanceCalculationService.shared,
+    notamLoader: (any NOTAMLoaderProtocol)? = nil
   ) {
     Vref = .notAvailable
     landingRun = .notAvailable
@@ -88,6 +89,7 @@ public final class LandingPerformanceViewModel: BasePerformanceViewModel {
     super.init(
       container: container,
       calculationService: calculationService,
+      notamLoader: notamLoader,
       defaultFlapSetting: .flaps100
     )
   }
diff --git a/SF50 Shared/Performance/ViewModel/TakeoffPerformanceViewModel.swift b/SF50 Shared/Performance/ViewModel/TakeoffPerformanceViewModel.swift
index e8d88f0..0284db1 100644
--- a/SF50 Shared/Performance/ViewModel/TakeoffPerformanceViewModel.swift	
+++ b/SF50 Shared/Performance/ViewModel/TakeoffPerformanceViewModel.swift	
@@ -99,7 +99,8 @@ public final class TakeoffPerformanceViewModel: BasePerformanceViewModel {
 
   public init(
     container: ModelContainer,
-    calculationService: PerformanceCalculationService = DefaultPerformanceCalculationService.shared
+    calculationService: PerformanceCalculationService = DefaultPerformanceCalculationService.shared,
+    notamLoader: (any NOTAMLoaderProtocol)? = nil
   ) {
     takeoffRun = .notAvailable
     takeoffDistance = .notAvailable
@@ -109,6 +110,7 @@ public final class TakeoffPerformanceViewModel: BasePerformanceViewModel {
     super.init(
       container: container,
       calculationService: calculationService,
+      notamLoader: notamLoader,
       defaultFlapSetting: .flaps50
     )
   }
diff --git a/SF50 TOLD/Launch/UITestingHelper.swift b/SF50 TOLD/Launch/UITestingHelper.swift
index 183d724..3111025 100644
--- a/SF50 TOLD/Launch/UITestingHelper.swift	
+++ b/SF50 TOLD/Launch/UITestingHelper.swift	
@@ -4,11 +4,20 @@ import SF50_Shared
 import SwiftData
 
 enum UITestingHelper {
+  static var isUITesting: Bool {
+    ProcessInfo.processInfo.arguments.contains("UI-TESTING")
+  }
+
   static var weatherLoader: (any WeatherLoaderProtocol)? {
     guard ProcessInfo.processInfo.arguments.contains("UI-TESTING") else { return nil }
     return UITestingWeatherLoader()
   }
 
+  static var notamLoader: (any NOTAMLoaderProtocol)? {
+    guard ProcessInfo.processInfo.arguments.contains("UI-TESTING") else { return nil }
+    return UITestingNOTAMLoader()
+  }
+
   static func setupUITestingEnvironment(container: ModelContainer) {
     // Reset all defaults
     Defaults.removeAll(suite: UserDefaults(suiteName: "group.codes.tim.TOLD")!)
diff --git a/SF50 TOLD/Launch/UITestingNOTAMLoader.swift b/SF50 TOLD/Launch/UITestingNOTAMLoader.swift
new file mode 100644
index 0000000..c9aba19
--- /dev/null
+++ b/SF50 TOLD/Launch/UITestingNOTAMLoader.swift	
@@ -0,0 +1,18 @@
+import Foundation
+import SF50_Shared
+
+/// NOTAM loader that returns no NOTAMs immediately.
+///
+/// Used during UI testing to eliminate network NOTAM requests. The live
+/// ``NOTAMLoader`` reaches the NOTAM API, which is unreachable on a CI runner;
+/// the in-progress request would otherwise leave the airport row spinning and
+/// stall the test harness's wait-for-idle.
+actor UITestingNOTAMLoader: NOTAMLoaderProtocol {
+  func fetchNOTAMs(
+    for _: String,
+    startDate _: Date?,
+    endDate _: Date?
+  ) -> [NOTAMResponse] {
+    []
+  }
+}
diff --git a/SF50 TOLD/Views/Components/TerrainComputingIndicator.swift b/SF50 TOLD/Views/Components/TerrainComputingIndicator.swift
new file mode 100644
index 0000000..d83ab0d
--- /dev/null
+++ b/SF50 TOLD/Views/Components/TerrainComputingIndicator.swift	
@@ -0,0 +1,22 @@
+import SwiftUI
+
+/// Indicates that the terrain path is being computed.
+///
+/// Renders an indeterminate ``ProgressView`` in normal use. Under UI testing it
+/// degrades to a static label, because an indeterminate spinner is a perpetual
+/// animation that keeps the app from going idle — stalling the test harness's
+/// wait-for-idle against a background computation the tests don't assert on.
+struct TerrainComputingIndicator: View {
+  var body: some View {
+    if UITestingHelper.isUITesting {
+      Text("Computing terrain path…")
+        .foregroundStyle(.secondary)
+    } else {
+      ProgressView("Computing terrain path…")
+    }
+  }
+}
+
+#Preview {
+  TerrainComputingIndicator()
+}
diff --git a/SF50 TOLD/Views/Performance/Landing/LandingView.swift b/SF50 TOLD/Views/Performance/Landing/LandingView.swift
index 5f11078..dd26cc9 100644
--- a/SF50 TOLD/Views/Performance/Landing/LandingView.swift	
+++ b/SF50 TOLD/Views/Performance/Landing/LandingView.swift	
@@ -29,7 +29,10 @@ struct LandingView: View {
     .withErrorSheet(state: performance)
     .onAppear {
       if performance == nil {
-        performance = .init(container: modelContext.container)
+        performance = .init(
+          container: modelContext.container,
+          notamLoader: UITestingHelper.notamLoader
+        )
       }
       if weather == nil {
         weather = .init(
diff --git a/SF50 TOLD/Views/Performance/Landing/Results/GoAroundProfileView.swift b/SF50 TOLD/Views/Performance/Landing/Results/GoAroundProfileView.swift
index 62482f4..3148ba7 100644
--- a/SF50 TOLD/Views/Performance/Landing/Results/GoAroundProfileView.swift	
+++ b/SF50 TOLD/Views/Performance/Landing/Results/GoAroundProfileView.swift	
@@ -115,7 +115,7 @@ struct GoAroundProfileView: View {
       if isComputing {
         HStack {
           Spacer()
-          ProgressView("Computing terrain path…")
+          TerrainComputingIndicator()
           Spacer()
         }
         .padding()
diff --git a/SF50 TOLD/Views/Performance/Takeoff/Results/ClimbProfileView.swift b/SF50 TOLD/Views/Performance/Takeoff/Results/ClimbProfileView.swift
index 55851eb..3fb852a 100644
--- a/SF50 TOLD/Views/Performance/Takeoff/Results/ClimbProfileView.swift	
+++ b/SF50 TOLD/Views/Performance/Takeoff/Results/ClimbProfileView.swift	
@@ -160,7 +160,7 @@ struct ClimbProfileView: View {
       if isComputing {
         HStack {
           Spacer()
-          ProgressView("Computing terrain path…")
+          TerrainComputingIndicator()
           Spacer()
         }
         .padding()
diff --git a/SF50 TOLD/Views/Performance/Takeoff/TakeoffView.swift b/SF50 TOLD/Views/Performance/Takeoff/TakeoffView.swift
index 2167147..dc29f49 100644
--- a/SF50 TOLD/Views/Performance/Takeoff/TakeoffView.swift	
+++ b/SF50 TOLD/Views/Performance/Takeoff/TakeoffView.swift	
@@ -29,7 +29,10 @@ struct TakeoffView: View {
     .withErrorSheet(state: performance)
     .onAppear {
       if performance == nil {
-        performance = .init(container: modelContext.container)
+        performance = .init(
+          container: modelContext.container,
+          notamLoader: UITestingHelper.notamLoader
+        )
       }
       if weather == nil {
         weather = .init(