diff --git a/build.sbt b/build.sbt
index cb871bf..7899d57 100644
--- a/build.sbt
+++ b/build.sbt
@@ -3,15 +3,15 @@ import Dependencies._
 
 name := "mesa"
 
-scalacOptions in (Compile, doc) += "-no-java-comments"
+Compile / doc / scalacOptions += "-no-java-comments"
 
 // factor out common settings across the sub-projects
 lazy val commonSettings = Seq(
   organization := "gov.nasa",
-  version := "1.0",
-  scalaVersion := "2.13.2",
-  mainClass in Compile := Some("gov.nasa.mesa.core.MesaMain"),
-  scalacOptions in (Compile, doc) += "-no-java-comments",
+  version := "1.1",
+  scalaVersion := "2.13.8",
+  Compile / mainClass := Some("gov.nasa.mesa.core.MesaMain"),
+  Compile / doc / scalacOptions += "-no-java-comments",
   // uncomment to get the full stack trace for failed tests
   //testOptions in Test += Tests.Argument(TestFrameworks.ScalaTest, "-oF"),
   libraryDependencies ++=
diff --git a/mesa-core/src/main/scala/gov/nasa/mesa/dataAcquisition/InstantReplayActor.scala b/mesa-core/src/main/scala/gov/nasa/mesa/dataAcquisition/InstantReplayActor.scala
index e9196a9..a556731 100644
--- a/mesa-core/src/main/scala/gov/nasa/mesa/dataAcquisition/InstantReplayActor.scala
+++ b/mesa-core/src/main/scala/gov/nasa/mesa/dataAcquisition/InstantReplayActor.scala
@@ -66,7 +66,7 @@ class InstantReplayActor(override val config: Config) extends
   val delayMillis: Int = config.getIntOrElse("delay-millis", 0)
 
   val reader: ArchiveReader = createReader
-  var noMoreData: Boolean = !reader.hasMoreData
+  var noMoreData: Boolean = !reader.hasMoreArchivedData
 
   /** Creates an instance of gov.nasa.race.archive.ArchiveReader to read
     * ArchiveEntry objects from the given archive.
diff --git a/mesa-nextgen/src/main/scala/gov/nasa/mesa/nextgen/core/Geo.scala b/mesa-nextgen/src/main/scala/gov/nasa/mesa/nextgen/core/Geo.scala
index 9dc5e04..eee9ecc 100644
--- a/mesa-nextgen/src/main/scala/gov/nasa/mesa/nextgen/core/Geo.scala
+++ b/mesa-nextgen/src/main/scala/gov/nasa/mesa/nextgen/core/Geo.scala
@@ -30,7 +30,7 @@
   */
 package gov.nasa.mesa.nextgen.core
 
-import gov.nasa.race.geo.Datum
+import gov.nasa.race.geo.{Datum, GeoPosition}
 import gov.nasa.race.uom.Area.√
 import gov.nasa.race.uom.Length.Meters
 import gov.nasa.race.uom.{Angle, Length}
@@ -78,8 +78,8 @@ object Geo {
     var minDevWaypoint: Option[Waypoint] = None
 
     for (w <- waypoints) {
-      val distance = getEuclideanDistance(state.position.φ, state.position.λ,
-        Meters(0), w.position.φ, w.position.λ, Meters(0))
+      val distance = getEuclideanDistance(GeoPosition(state.position.φ, state.position.λ,
+        Meters(0)), GeoPosition(w.position.φ, w.position.λ, Meters(0)))
 
       if (distance <= proximity && distance < minDev) {
         minDevWaypoint = Some(w)
@@ -102,17 +102,16 @@ object Geo {
   : Boolean = {
     val alt1 = Meters(0)
     val alt2 = Meters(0)
-    getEuclideanDistance(state.position.φ, state.position.λ, alt1,
-      wp.position.φ, wp.position.λ, alt2) <= proximity
+    getEuclideanDistance(GeoPosition(state.position.φ, state.position.λ, alt1),
+      GeoPosition(wp.position.φ, wp.position.λ, alt2)) <= proximity
   }
 
   /** Returns the Euclidean distance between the two given geographic
     * coordinates.
     */
-  def getEuclideanDistance(φ1: Angle, λ1: Angle, alt1: Length, φ2: Angle,
-                           λ2: Angle, alt2: Length): Length = {
-    val p1 = Datum.wgs84ToECEF(φ1, λ1, alt1)
-    val p2 = Datum.wgs84ToECEF(φ2, λ2, alt2)
-    √((p1.x - p2.x).`²` + (p1.y - p2.y).`²` + (p1.z - p2.z).`²`)
+  def getEuclideanDistance(pos1: GeoPosition, pos2: GeoPosition): Length = {
+      val p1 = Datum.wgs84ToECEF(pos1)
+      val p2 = Datum.wgs84ToECEF(pos2)
+      √((p1.x - p2.x).`²` + (p1.y - p2.y).`²` + (p1.z - p2.z).`²`)
   }
 }
\ No newline at end of file
diff --git a/mesa-nextgen/src/main/scala/gov/nasa/mesa/nextgen/dataAcquisition/FlightStateSbsReplayActor.scala b/mesa-nextgen/src/main/scala/gov/nasa/mesa/nextgen/dataAcquisition/FlightStateSbsReplayActor.scala
index 4bc34dc..a26af61 100644
--- a/mesa-nextgen/src/main/scala/gov/nasa/mesa/nextgen/dataAcquisition/FlightStateSbsReplayActor.scala
+++ b/mesa-nextgen/src/main/scala/gov/nasa/mesa/nextgen/dataAcquisition/FlightStateSbsReplayActor.scala
@@ -55,8 +55,10 @@ import scala.concurrent.duration.Duration
   * @param config the actor configuration
   */
 class FlightStateSbsReplayActor(val config: Config)
-  extends Replayer[FlightStateSbsReader] with PeriodicRaceActor
+  extends Replayer with PeriodicRaceActor
     with SbsImporter {
+    type R = FlightStateSbsReader
+
     class DropCheckSBSReader (conf: Config)
       extends FlightStateSbsReader(config) {
       override def dropTrack (id: String, cs: String, date: DateTime,
@@ -88,17 +90,17 @@ class FlightStateSbsReader(iStream: InputStream, pathName: String="<unknown>",
     conf.getMappedStringOrElse("default-zone", ZoneId.of, ZoneId.systemDefault)
   )
 
-  override val updater: SbsUpdater = new FstateSbsArchiveUpdater
+  override val updater: SbsUpdater = new SbsUpdater( Some(this), defaultZone)
 
-  class FstateSbsArchiveUpdater extends SbsUpdater(updateTrack,dropTrack,
-    Some(this), defaultZone) {
-    override protected def acquireMoreData: Boolean = refillBuf
-  }
+//  class FstateSbsArchiveUpdater extends SbsUpdater(updateTrack,dropTrack,
+//    Some(this), defaultZone) {
+//    override protected def acquireMoreData: Boolean = refillBuf
+//  }
 
-  override def updateTrack (track: TrackedObject): Boolean = {
-    val fstate = new FlightState(track.id, track.cs, track.position,
-      track.speed, track.heading, track.vr, track.date, track.status)
-    next = someEntry(fstate.date, fstate)
-    false
-  }
+//  override def updateTrack (track: TrackedObject): Boolean = {
+//    val fstate = new FlightState(track.id, track.cs, track.position,
+//      track.speed, track.heading, track.vr, track.date, track.status)
+//    next = someEntry(fstate.date, fstate)
+//    false
+//  }
 }
\ No newline at end of file
diff --git a/project/Dependencies.scala b/project/Dependencies.scala
index 9831ba3..4b9b9e0 100644
--- a/project/Dependencies.scala
+++ b/project/Dependencies.scala
@@ -2,7 +2,7 @@ import sbt._
 
 object Dependencies {
   lazy val latestVersion = "latest.release"
-  lazy val raceVersion = "1.8.0"
+  lazy val raceVersion = "1.8.1"
 
   val typesafeConfig = "com.typesafe" % "config" % "1.4.1"
 
diff --git a/project/build.properties b/project/build.properties
index f37b0aa..fcc6ebc 100644
--- a/project/build.properties
+++ b/project/build.properties
@@ -1 +1 @@
-sbt.version = 1.3.10
\ No newline at end of file
+sbt.version = 1.7.1
\ No newline at end of file