diff --git a/DESCRIPTION b/DESCRIPTION
index a4faecc9..febe6f14 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -2,8 +2,8 @@ Package: glatos
 Type: Package
 Title: A package for the Great Lakes Acoustic Telemetry Observation System
 Description: Functions useful to members of the Great Lakes Acoustic Telemetry Observation System https://glatos.glos.us; many more broadly relevant to simulating, processing, analysing, and visualizing acoustic telemetry data.
-Version: 0.8.0.9003
-Date: 2024-01-23
+Version: 0.8.0.9004
+Date: 2024-02-16
 Depends: R (>= 3.5.0)
 Imports:
 		av,
diff --git a/NEWS.md b/NEWS.md
index 294852a6..e82042cd 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -3,7 +3,11 @@
 # glatos 0.8.0 (dev)
 
 
-### Bug fixes
+### Bug fixes and minor changes
+
+- Add `@srs` slot to `greatLakesTrLayer` data object and rename file 
+  'data/greatLakesTrLayer.rda'.
+    - fixes [issue #213](https://github.com/ocean-tracking-network/glatos/issues/213)
 
 - Fix bug in `read_glatos_workbook()` where timestamps during daylight savings 
   were shifted one hour on linux operating system (not an issue on windows or 
diff --git a/data-raw/data-greatLakesTrLayer.r b/data-raw/data-greatLakesTrLayer.r
new file mode 100644
index 00000000..cb347bd3
--- /dev/null
+++ b/data-raw/data-greatLakesTrLayer.r
@@ -0,0 +1,15 @@
+# Make data object great_lakes_polygon
+
+# get path to example detections file
+data("greatLakesPoly")
+
+# coerce to sf
+great_lakes_polygon <- sf::st_as_sf(greatLakesPoly)
+
+# set CRS
+sf::st_crs(great_lakes_polygon) <- 4326
+
+#----------------------------------------------------
+
+# add to (exported) data
+usethis::use_data(great_lakes_polygon, overwrite = TRUE)
diff --git a/data/greatLakesTrLayer.rda b/data/greatLakesTrLayer.rda
new file mode 100644
index 00000000..366d35db
Binary files /dev/null and b/data/greatLakesTrLayer.rda differ
diff --git a/data/greatLakesTrLayer.rdata b/data/greatLakesTrLayer.rdata
deleted file mode 100644
index ab9827ed..00000000
Binary files a/data/greatLakesTrLayer.rdata and /dev/null differ
diff --git a/man/glatos.Rd b/man/glatos.Rd
index 9f8f0444..9401faf3 100644
--- a/man/glatos.Rd
+++ b/man/glatos.Rd
@@ -2,6 +2,7 @@
 % Please edit documentation in R/package-glatos.r
 \docType{package}
 \name{glatos}
+\alias{-package}
 \alias{glatos}
 \title{An R package for the Great Lakes Acoustic Telemetry Observation System}
 \description{