chore: limit ndl output to 99

README.md

@@ -274,7 +274,7 @@ All decompression stages calculated to clear deco obligations and resurface in a
 
 The NDL is a theoretical time obtained by calculating inert gas uptake and release in the body that determines a time interval a diver may theoretically spend at given depth without aquiring any decompression obligations (given constant depth and gas mix).
 
-- `ndl()` - no-decompression limit for current model state in minutes, assuming constant depth and gas mix
+- `ndl()` - no-decompression limit for current model state in minutes, assuming constant depth and gas mix. This method has a cut-off at 99 minutes
 
 ```rust
 use dive_deco::{DecoModel, BuehlmannModel, BuehlmannConfig, Gas};

src/buehlmann/buehlmann_model.rs

@@ -102,7 +102,7 @@ impl DecoModel for BuehlmannModel {
     }
 
     fn ndl(&self) -> Minutes {
-        let mut ndl: Minutes = Minutes::MAX;
+        let mut ndl: Minutes = NDL_CUT_OFF_MINS;
 
         // create a simulation model based on current model's state
         let mut sim_model = self.fork();

tests/buehlmann_tests.rs

@@ -81,10 +81,10 @@ fn test_ndl_cut_off() {
     let air = Gas::new(0.21, 0.);
 
     model.record(0., 0, &air);
-    assert_eq!(model.ndl(), Minutes::MAX);
+    assert_eq!(model.ndl(), 99);
 
     model.record(10., 10*60, &air);
-    assert_eq!(model.ndl(), Minutes::MAX);
+    assert_eq!(model.ndl(), 99);
 }
 
 #[test]