Sian Ka'an - Feb 10, 2007 update

Dive Team: Per, Sigurd & Mike

Surface support: Skybert from Norway

Dive site

Name: Yax Chen
Coordinate: WGS84 UTM 451245 2226084

Conditions: The water clarity in the Yax Chen basin was exceptionally clear. The water condition in the downstream part of the cave was fair. Flow was noticeable. The downstream is heading NE/E in parallel with the coast line. There’s a fair amount of organic particles in suspension throughout the water column.

Dive Objectives:

  1. Clean up dive. Remove safeties at 3k, 7k and Arizona.
Summary of results:
  • All went well.
Possible follow up:
  1. Marked lead in tannic dome between SW passage and first red clay restriction. SM # X4 Yaxchen 07
Equipment and Survey: 2 x EAN 32 stages and 2 x 33amp scooter per diver

Dive log:
Dive # 1
Time in: 11h10
Time out: 14h54
Total run time: 224 minutes
Max Depth: 81 ft
Av Depth: 48 ft
Divers: Per, Sigurd & Mike

Dive Team: Per & Sigurd

Surface support: Mike Lindsey

Dive site

Name: Yax Chen
Coordinate: WGS84 UTM 451245 2226084

Conditions: The water clarity in the Yax Chen basin was exceptionally clear. The water condition in the downstream part of the cave was fair. Flow was noticeable. The downstream is heading NE/E in parallel with the coast line. There’s a fair amount of organic particles in suspension throughout the water column.

Dive Objectives:
  1. Clean up dive. Remove safeties from downstream section.
Summary of results:
  • All went well.
Equipment and Survey: 1 x EAN 32 stage and 1 x 33amp scooter per diver

Dive log:
Dive # 2
Time in: 15h10
Time out: 15h45
Total run time: 95 minutes
Max Depth: 40 ft
Av Depth: 35 ft
Divers: Per & Sigurd

Dive Team: Fred & Chris

Surface support: Capitan Esteban

Dive site

Name: Entrada Boca Paila

Conditions: There was quite some flow at the entrance. The boil was clearly visible from the surface. North wind was blowing. Visibility in the cave was good.

Dive Objectives:
  1. Explore upstream lead at SM# 106
Summary of results:
  1. This was interesting exploration through big cave running W/SW. The team explored 1,700ft of cave.
Possible follow up:
  1. The cave at the end of the line is wide open.
  2. There's many more leads to check closer to the entrance
  3. Silt sampling would need collecting.

Comments/observation: The flow is always existent. There’s no doubt that this is a big cave. The flow is coming from the SW. There’s a lot of percolation but less than Entrada Caapechen. Cave is white bellow layer of brown organic matters. There is big but sporadic speleothems. Halocline is at 40’ near the entrance.

Line name: Comple
Passage width (meters): 5
Passage Height (meters): 12
Passage Shape: Canyons & Domes
Fauna: Shrimp
Speleothems: Yes
Sediment: Organic - Cream and Brown
Infill: Breakdown
Water: Halocline near ceiling at 57 ft -
Additional Comments: /

Equipment and Survey: 3 x EAN 32 stages and 2 x 33amp scooter per diver

Dive log:
Dive # 3
Time in: 12h00
Time out: 15h15
Total run time: 195 minutes
Max Depth: 64 ft
Av Depth: 50 ft
Divers: Fred & Chris