diff --git a/lib/aprs/is/is.ex b/lib/aprs/is/is.ex
index 1164a19..6e0c762 100644
--- a/lib/aprs/is/is.ex
+++ b/lib/aprs/is/is.ex
@@ -356,13 +356,6 @@ defmodule Aprs.Is do
                 {:error, :validation_error} ->
                   Logger.error("Validation error while storing packet from #{inspect(parsed_message.sender)}")
 
-                  Logger.debug("Packet attributes that failed: #{inspect(attrs)}")
-
-                {:error, other_error} ->
-                  Logger.error(
-                    "Unknown error storing packet from #{inspect(parsed_message.sender)}: #{inspect(other_error)}"
-                  )
-
                   Logger.debug("Packet attributes that failed: #{inspect(attrs)}")
               end
             else
@@ -380,16 +373,6 @@ defmodule Aprs.Is do
         # Broadcast to live clients
         AprsWeb.Endpoint.broadcast("aprs_messages", "packet", parsed_message)
 
-      # Logger.debug("BROADCAST: " <> inspect(parsed_message))
-
-      # Phoenix.PubSub.broadcast(
-      #   Aprs.PubSub,
-      #   "aprs_messages",
-      #   {:packet, parsed_message}
-      # )
-
-      # IO.inspect(parsed_message)
-      # Logger.debug("SERVER:" <> message)
       {:error, :invalid_packet} ->
         Logger.debug("PARSE ERROR: invalid packet")
 
@@ -401,10 +384,6 @@ defmodule Aprs.Is do
       {:error, error} ->
         Logger.debug("PARSE ERROR: " <> error)
         Aprs.Packets.store_bad_packet(message, %{message: error, type: "ParseError"})
-
-      x ->
-        Logger.debug("PARSE ERROR: " <> x)
-        Aprs.Packets.store_bad_packet(message, %{message: inspect(x), type: "ParseError"})
     end
   end
 
@@ -437,10 +416,6 @@ defmodule Aprs.Is do
 
           valid
 
-        %{lat: lat, lon: lon} when not is_nil(lat) and not is_nil(lon) ->
-          # Handle case where coordinates are at top level
-          are_valid_coords?(lat, lon)
-
         _other ->
           Logger.debug("Unrecognized packet format: #{inspect(Map.keys(packet))}")
           false
diff --git a/lib/aprs/packet_replay.ex b/lib/aprs/packet_replay.ex
index 4e872a3..0d5a129 100644
--- a/lib/aprs/packet_replay.ex
+++ b/lib/aprs/packet_replay.ex
@@ -169,7 +169,7 @@ defmodule Aprs.PacketReplay do
 
     # Send notification to client that replay is starting
     Endpoint.broadcast(state.replay_topic, "replay_started", %{
-      total_packets: Packets.get_historical_packet_count(replay_opts),
+      total_packets: Packets.get_historical_packet_count(Map.new(replay_opts)),
       start_time: state.start_time,
       end_time: state.end_time,
       replay_speed: state.replay_speed,
@@ -177,7 +177,12 @@ defmodule Aprs.PacketReplay do
     })
 
     # Get packets and start streaming
-    stream = Packets.stream_packets_for_replay(Keyword.put(replay_opts, :playback_speed, state.replay_speed))
+    replay_opts_map =
+      replay_opts
+      |> Keyword.put(:playback_speed, state.replay_speed)
+      |> Map.new()
+
+    stream = Packets.stream_packets_for_replay(replay_opts_map)
 
     # Schedule the first packet
     case stream |> Stream.take(1) |> Enum.to_list() do
diff --git a/lib/parser.ex b/lib/parser.ex
index 97f963d..ffa516c 100644
--- a/lib/parser.ex
+++ b/lib/parser.ex
@@ -28,8 +28,7 @@ defmodule Parser do
          information_field: data_trimmed,
          data_type: data_type,
          base_callsign: base_callsign,
-         # Ensure ssid is never nil
-         ssid: ssid || "0",
+         ssid: ssid,
          data_extended: data_extended,
          # Set received_at when creating packet
          received_at: DateTime.truncate(DateTime.utc_now(), :microsecond)
diff --git a/lib/types/mic_e.ex b/lib/types/mic_e.ex
index 15f1d41..eae7145 100644
--- a/lib/types/mic_e.ex
+++ b/lib/types/mic_e.ex
@@ -4,6 +4,29 @@ defmodule Parser.Types.MicE do
   """
   @behaviour Access
 
+  @type direction :: :north | :south | :east | :west | :unknown
+
+  @type t :: %__MODULE__{
+          lat_degrees: number(),
+          lat_minutes: number(),
+          lat_fractional: number(),
+          lat_direction: direction(),
+          lon_direction: direction(),
+          longitude_offset: number(),
+          message_code: String.t() | nil,
+          message_description: String.t() | nil,
+          dti: String.t() | nil,
+          heading: number(),
+          lon_degrees: number(),
+          lon_minutes: number(),
+          lon_fractional: number(),
+          speed: number(),
+          manufacturer: String.t(),
+          message: String.t(),
+          symbol_table_id: String.t(),
+          symbol_code: String.t()
+        }
+
   defstruct lat_degrees: 0,
             lat_minutes: 0,
             lat_fractional: 0,
@@ -31,6 +54,7 @@ defmodule Parser.Types.MicE do
   Fetch a key from the MicE struct.
   Special handling for :latitude and :longitude which are calculated from components.
   """
+  @spec fetch(t(), atom() | String.t()) :: {:ok, any()} | :error
   def fetch(mic_e, :latitude) do
     # Calculate decimal latitude from components
     if is_number(mic_e.lat_degrees) and is_number(mic_e.lat_minutes) do
@@ -71,16 +95,19 @@ defmodule Parser.Types.MicE do
   @doc """
   Gets a value and updates it with the given function.
   """
+  @spec get_and_update(t(), atom() | String.t(), (any() -> {any(), any()} | :pop)) :: {any(), t()}
   def get_and_update(mic_e, key, fun) do
     value = get_value(mic_e, key)
     apply_update_function(mic_e, key, value, fun)
   end
 
+  @spec get_value(t(), atom() | String.t()) :: any()
   defp get_value(mic_e, :latitude), do: calculate_latitude(mic_e)
   defp get_value(mic_e, :longitude), do: calculate_longitude(mic_e)
   defp get_value(mic_e, key) when is_binary(key), do: get_string_key_value(mic_e, key)
   defp get_value(mic_e, key), do: Map.get(mic_e, key)
 
+  @spec calculate_latitude(t()) :: float() | nil
   defp calculate_latitude(mic_e) do
     if is_number(mic_e.lat_degrees) and is_number(mic_e.lat_minutes) do
       lat = mic_e.lat_degrees + mic_e.lat_minutes / 60.0
@@ -88,6 +115,7 @@ defmodule Parser.Types.MicE do
     end
   end
 
+  @spec calculate_longitude(t()) :: float() | nil
   defp calculate_longitude(mic_e) do
     if is_number(mic_e.lon_degrees) and is_number(mic_e.lon_minutes) do
       lon = mic_e.lon_degrees + mic_e.lon_minutes / 60.0
@@ -95,6 +123,7 @@ defmodule Parser.Types.MicE do
     end
   end
 
+  @spec get_string_key_value(t(), String.t()) :: any()
   defp get_string_key_value(mic_e, key) do
     atom_key = String.to_existing_atom(key)
     Map.get(mic_e, atom_key)
@@ -103,6 +132,7 @@ defmodule Parser.Types.MicE do
       nil
   end
 
+  @spec apply_update_function(t(), atom() | String.t(), any(), (any() -> {any(), any()} | :pop)) :: {any(), t()}
   defp apply_update_function(mic_e, key, value, fun) do
     case fun.(value) do
       {get, update} -> {get, Map.put(mic_e, key, update)}
@@ -113,6 +143,7 @@ defmodule Parser.Types.MicE do
   @doc """
   Removes the given key from the struct with the default implementation.
   """
+  @spec pop(t(), atom() | String.t()) :: {any(), t()}
   def pop(mic_e, key) when is_atom(key) do
     {Map.get(mic_e, key), Map.put(mic_e, key, nil)}
   end