diff --git a/src/oceanic_atom2.c b/src/oceanic_atom2.c
index 0c63e16..5eb60a6 100644
--- a/src/oceanic_atom2.c
+++ b/src/oceanic_atom2.c
@@ -101,7 +101,7 @@ static const oceanic_common_layout_t aeris_f10_layout = {
 	0x0D80, /* rb_profile_begin */
 	0x10000, /* rb_profile_end */
 	0, /* pt_mode_global */
-	2, /* pt_mode_logbook */
+	3, /* pt_mode_logbook */
 	0, /* pt_mode_serial */
 };
 
@@ -116,7 +116,7 @@ static const oceanic_common_layout_t aeris_f11_layout = {
 	0x0D80, /* rb_profile_begin */
 	0x20000, /* rb_profile_end */
 	0, /* pt_mode_global */
-	3, /* pt_mode_logbook */
+	2, /* pt_mode_logbook */
 	0, /* pt_mode_serial */
 };
 
diff --git a/src/oceanic_common.c b/src/oceanic_common.c
index e79406a..f09e629 100644
--- a/src/oceanic_common.c
+++ b/src/oceanic_common.c
@@ -49,7 +49,7 @@ get_profile_first (const unsigned char data[], const oceanic_common_layout_t *la
 		value = array_uint16_le (data + 5);
 	} else if (layout->pt_mode_logbook == 1) {
 		value = array_uint16_le (data + 4);
-	} else if (layout->pt_mode_logbook == 3) {
+	} else if (layout->pt_mode_logbook == 2) {
 		value = array_uint16_le (data + 16);
 	} else {
 		return array_uint16_le (data + 16);
@@ -79,7 +79,7 @@ get_profile_last (const unsigned char data[], const oceanic_common_layout_t *lay
 		value = array_uint16_le (data + 6) >> 4;
 	} else if (layout->pt_mode_logbook == 1) {
 		value = array_uint16_le (data + 6);
-	} else if (layout->pt_mode_logbook == 3) {
+	} else if (layout->pt_mode_logbook == 2) {
 		value = array_uint16_le (data + 18);
 	} else {
 		return array_uint16_le(data + 18);