From f2d3a25adb7c23f80e5a4d7db0d085b5ec5e6236 Mon Sep 17 00:00:00 2001
From: j-atkins <106238905+j-atkins@users.noreply.github.com>
Date: Mon, 1 Dec 2025 14:10:13 +0100
Subject: [PATCH 1/2] add small buffer to spacetime region, may help avoid some
 issues

---
 src/virtualship/instruments/ship_underwater_st.py | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/virtualship/instruments/ship_underwater_st.py b/src/virtualship/instruments/ship_underwater_st.py
index 088a439f..02920b30 100644
--- a/src/virtualship/instruments/ship_underwater_st.py
+++ b/src/virtualship/instruments/ship_underwater_st.py
@@ -2,8 +2,8 @@
 from typing import ClassVar
 
 import numpy as np
-from parcels import ParticleSet, ScipyParticle, Variable
 
+from parcels import ParticleSet, ScipyParticle, Variable
 from virtualship.instruments.base import Instrument
 from virtualship.instruments.types import InstrumentType
 from virtualship.utils import add_dummy_UV, register_instrument
@@ -58,6 +58,10 @@ class Underwater_STInstrument(Instrument):
     def __init__(self, expedition, from_data):
         """Initialize Underwater_STInstrument."""
         variables = {"S": "so", "T": "thetao"}
+        spacetime_buffer_size = {
+            "latlon": 0.25,  # [degrees]
+            "time": 0.0,  # [days]
+        }
 
         super().__init__(
             expedition,
@@ -65,7 +69,7 @@ def __init__(self, expedition, from_data):
             add_bathymetry=False,
             allow_time_extrapolation=True,
             verbose_progress=False,
-            spacetime_buffer_size=None,
+            spacetime_buffer_size=spacetime_buffer_size,
             limit_spec=None,
             from_data=from_data,
         )

From cceffbeca8969c4ba1a229911e7189b8cd3c1409 Mon Sep 17 00:00:00 2001
From: "pre-commit-ci[bot]"
 <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Date: Mon, 1 Dec 2025 13:13:51 +0000
Subject: [PATCH 2/2] [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci
---
 src/virtualship/instruments/ship_underwater_st.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/virtualship/instruments/ship_underwater_st.py b/src/virtualship/instruments/ship_underwater_st.py
index 02920b30..1e66ba50 100644
--- a/src/virtualship/instruments/ship_underwater_st.py
+++ b/src/virtualship/instruments/ship_underwater_st.py
@@ -2,8 +2,8 @@
 from typing import ClassVar
 
 import numpy as np
-
 from parcels import ParticleSet, ScipyParticle, Variable
+
 from virtualship.instruments.base import Instrument
 from virtualship.instruments.types import InstrumentType
 from virtualship.utils import add_dummy_UV, register_instrument