diff --git a/src/virtualship/cli/_fetch.py b/src/virtualship/cli/_fetch.py
index 16712d38..2e09dec2 100644
--- a/src/virtualship/cli/_fetch.py
+++ b/src/virtualship/cli/_fetch.py
@@ -38,7 +38,7 @@ def _fetch(path: str | Path, username: str | None, password: str | None) -> None
     be provided on prompt, via command line arguments, or via a YAML config file. Run
     `virtualship fetch` on an expedition for more info.
     """
-    from virtualship.expedition.instrument_type import InstrumentType
+    from virtualship.expedition.ship_config import InstrumentType
 
     if sum([username is None, password is None]) == 1:
         raise ValueError("Both username and password must be provided when using CLI.")
diff --git a/src/virtualship/expedition/__init__.py b/src/virtualship/expedition/__init__.py
index 9137f7b1..74403732 100644
--- a/src/virtualship/expedition/__init__.py
+++ b/src/virtualship/expedition/__init__.py
@@ -2,8 +2,7 @@
 
 from .do_expedition import do_expedition
 from .input_data import InputData
-from .instrument_type import InstrumentType
-from .schedule import Schedule
+from .schedule import Schedule, Waypoint
 from .ship_config import (
     ADCPConfig,
     ArgoFloatConfig,
@@ -13,7 +12,6 @@
     ShipUnderwaterSTConfig,
 )
 from .space_time_region import SpaceTimeRegion
-from .waypoint import Waypoint
 
 __all__ = [
     "ADCPConfig",
diff --git a/src/virtualship/expedition/checkpoint.py b/src/virtualship/expedition/checkpoint.py
index 75dd2356..be6079ef 100644
--- a/src/virtualship/expedition/checkpoint.py
+++ b/src/virtualship/expedition/checkpoint.py
@@ -7,8 +7,8 @@
 import pydantic
 import yaml
 
-from .instrument_type import InstrumentType
 from .schedule import Schedule
+from .ship_config import InstrumentType
 
 
 class _YamlDumper(yaml.SafeDumper):
diff --git a/src/virtualship/expedition/instrument_type.py b/src/virtualship/expedition/instrument_type.py
deleted file mode 100644
index 82360c7b..00000000
--- a/src/virtualship/expedition/instrument_type.py
+++ /dev/null
@@ -1,12 +0,0 @@
-"""InstrumentType Enum."""
-
-from enum import Enum
-
-
-class InstrumentType(Enum):
-    """Types of instruments."""
-
-    CTD = "CTD"
-    DRIFTER = "DRIFTER"
-    ARGO_FLOAT = "ARGO_FLOAT"
-    XBT = "XBT"
diff --git a/src/virtualship/expedition/schedule.py b/src/virtualship/expedition/schedule.py
index 6c3bbfd1..79f14758 100644
--- a/src/virtualship/expedition/schedule.py
+++ b/src/virtualship/expedition/schedule.py
@@ -3,7 +3,7 @@
 from __future__ import annotations
 
 import itertools
-from datetime import timedelta
+from datetime import datetime, timedelta
 from pathlib import Path
 
 import pydantic
@@ -11,14 +11,29 @@
 import yaml
 from parcels import FieldSet
 
+from ..location import Location
 from .input_data import InputData
-from .instrument_type import InstrumentType
+from .ship_config import InstrumentType
 from .space_time_region import SpaceTimeRegion
-from .waypoint import Waypoint
 
 projection: pyproj.Geod = pyproj.Geod(ellps="WGS84")
 
 
+class Waypoint(pydantic.BaseModel):
+    """A Waypoint to sail to with an optional time and an optional instrument."""
+
+    location: Location
+    time: datetime | None = None
+    instrument: InstrumentType | list[InstrumentType] | None = None
+
+    @pydantic.field_serializer("instrument")
+    def serialize_instrument(self, instrument):
+        """Ensure InstrumentType is serialized as a string (or list of strings)."""
+        if isinstance(instrument, list):
+            return [inst.value for inst in instrument]
+        return instrument.value if instrument else None
+
+
 class Schedule(pydantic.BaseModel):
     """Schedule of the virtual ship."""
 
diff --git a/src/virtualship/expedition/ship_config.py b/src/virtualship/expedition/ship_config.py
index b411443f..4f238b36 100644
--- a/src/virtualship/expedition/ship_config.py
+++ b/src/virtualship/expedition/ship_config.py
@@ -3,15 +3,26 @@
 from __future__ import annotations
 
 from datetime import timedelta
+from enum import Enum
 from pathlib import Path
+from typing import TYPE_CHECKING
 
 import pydantic
 import yaml
 
 from virtualship.utils import _validate_numeric_mins_to_timedelta
 
-from .instrument_type import InstrumentType
-from .schedule import Schedule
+if TYPE_CHECKING:
+    from .schedule import Schedule
+
+
+class InstrumentType(Enum):
+    """Types of instruments."""
+
+    CTD = "CTD"
+    DRIFTER = "DRIFTER"
+    ARGO_FLOAT = "ARGO_FLOAT"
+    XBT = "XBT"
 
 
 class ArgoFloatConfig(pydantic.BaseModel):
diff --git a/src/virtualship/expedition/simulate_schedule.py b/src/virtualship/expedition/simulate_schedule.py
index fadfd2aa..df36b8b2 100644
--- a/src/virtualship/expedition/simulate_schedule.py
+++ b/src/virtualship/expedition/simulate_schedule.py
@@ -13,10 +13,8 @@
 from ..instruments.xbt import XBT
 from ..location import Location
 from ..spacetime import Spacetime
-from .instrument_type import InstrumentType
-from .schedule import Schedule
-from .ship_config import ShipConfig
-from .waypoint import Waypoint
+from .schedule import Schedule, Waypoint
+from .ship_config import InstrumentType, ShipConfig
 
 
 @dataclass
diff --git a/src/virtualship/expedition/waypoint.py b/src/virtualship/expedition/waypoint.py
deleted file mode 100644
index 018ccecb..00000000
--- a/src/virtualship/expedition/waypoint.py
+++ /dev/null
@@ -1,23 +0,0 @@
-"""Waypoint class."""
-
-from datetime import datetime
-
-from pydantic import BaseModel, field_serializer
-
-from ..location import Location
-from .instrument_type import InstrumentType
-
-
-class Waypoint(BaseModel):
-    """A Waypoint to sail to with an optional time and an optional instrument."""
-
-    location: Location
-    time: datetime | None = None
-    instrument: InstrumentType | list[InstrumentType] | None = None
-
-    @field_serializer("instrument")
-    def serialize_instrument(self, instrument):
-        """Ensure InstrumentType is serialized as a string (or list of strings)."""
-        if isinstance(instrument, list):
-            return [inst.value for inst in instrument]
-        return instrument.value if instrument else None
diff --git a/src/virtualship/utils.py b/src/virtualship/utils.py
index c798a3dd..1d3203de 100644
--- a/src/virtualship/utils.py
+++ b/src/virtualship/utils.py
@@ -139,14 +139,13 @@ def mfp_to_yaml(coordinates_file_path: str, yaml_output_path: str):  # noqa: D41
 
     """
     # Importing Schedule and related models from expedition module
-    from virtualship.expedition.instrument_type import InstrumentType
-    from virtualship.expedition.schedule import Schedule
+    from virtualship.expedition.schedule import Location, Schedule, Waypoint
+    from virtualship.expedition.ship_config import InstrumentType
     from virtualship.expedition.space_time_region import (
         SpaceTimeRegion,
         SpatialRange,
         TimeRange,
     )
-    from virtualship.expedition.waypoint import Location, Waypoint
 
     # Read data from file
     coordinates_data = load_coordinates(coordinates_file_path)
diff --git a/tests/expedition/test_schedule.py b/tests/expedition/test_schedule.py
index 50c35d2f..eabcbd9a 100644
--- a/tests/expedition/test_schedule.py
+++ b/tests/expedition/test_schedule.py
@@ -5,9 +5,8 @@
 import pytest
 
 from virtualship import Location
-from virtualship.expedition import Waypoint
 from virtualship.expedition.do_expedition import _load_input_data
-from virtualship.expedition.schedule import Schedule, ScheduleError
+from virtualship.expedition.schedule import Schedule, ScheduleError, Waypoint
 from virtualship.utils import _get_ship_config
 
 projection = pyproj.Geod(ellps="WGS84")
diff --git a/tests/test_mfp_to_yaml.py b/tests/test_mfp_to_yaml.py
index a3175185..3ef511f5 100644
--- a/tests/test_mfp_to_yaml.py
+++ b/tests/test_mfp_to_yaml.py
@@ -3,8 +3,8 @@
 import pandas as pd
 import pytest
 
-from virtualship.expedition.instrument_type import InstrumentType
 from virtualship.expedition.schedule import Schedule
+from virtualship.expedition.ship_config import InstrumentType
 from virtualship.utils import mfp_to_yaml