diff --git a/marine_letkf.yaml.j2 b/marine_letkf.yaml.j2
new file mode 100644
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--- /dev/null
+++ b/marine_letkf.yaml.j2
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+
+geometry:
+  geom_grid_file: soca_gridspec.nc
+  mom6_input_nml: mom_input.nml
+  fields metadata: fields_metadata.yaml
+
+time window:
+  begin: &date '{{window_begin}}'
+  length: PT6H 
+
+background:
+  members from template:
+    template:
+      date: '{{window_middle}}'
+      ocn_filename: "ocean.%mem%.nc"
+      ice_filename: "ice.%mem%.nc"
+      read_from_file: 1
+      basename: {{enspert_relpath}}/ens/
+      state variables: [sea_water_salinity, sea_water_potential_temperature, sea_surface_height_above_geoid, sea_water_cell_thickness, eastward_sea_water_velocity, northward_sea_water_velocity, sea_ice_area_fraction]
+    pattern: '%mem%'
+    nmembers: {{marine_number_ensemble_members}}
+
+observations: # all_observations
+  observers:
+
+driver:
+  do posterior observer: true
+  save posterior mean increment: true
+  save posterior mean: true
+  save posterior variance: true
+  save prior mean: true
+  save prior variance: true
+
+local ensemble DA:
+  solver: LETKF
+  inflation:
+    rtps: 0.5
+    rtpp: 0.6
+    mult: 1.1
+
+output:
+  datadir: letkf_output/
+  date: *date
+  exp: letkf
+  type: ens
+
+output mean prior:
+  datadir: letkf_output/
+  date: *date
+  exp: letkf.mean_prior
+  type: fc
+
+output variance prior:
+  datadir: letkf_output/
+  date: *date
+  exp: letkf.var_prior
+  type: fc
+
+output variance posterior:
+  datadir: letkf_output/
+  date: *date
+  exp: letkf.var_post
+  type: an
+
+output increment:
+  datadir: letkf_output/
+  date: *date
+  exp: letkf.inc
+  type: ens
+