Mariner's Draft Survey

Mariner's Draft Survey is the draft survey and cargo planning app for bulk carrier officers. Built by a Chief Officer, it works from your own ship's tables and shows the working behind every figure, so you can check the calculation, not just trust it.

DRAFT SURVEY
• Six drafts, forward, midships and aft, port and starboard, on a ship diagram
• Corrections to the perpendiculars, mean of means, trim, list and hog or sag
• Hydrostatic interpolation from your vessel's own table
• First and second trim corrections, and the dock water density correction
• Ballast, fresh water, fuel and other deductibles from your sounding tables, with trim and list corrections
• Net cargo by difference, with lightship and constant
• Tap any figure for its formula and the numbers that went into it
• A signed PDF report with your company's name and logo

STOWAGE AND LOADING
• Stowage Plan: share the cargo between the holds for the trim you want, loading or discharging, with a second cargo or on top of cargo already aboard
• Sequence Plan: pours and ballast steps the terminal can work, with trim checked at every step
• Manual Stowage: when the stow is already decided and you just want the sheet
• Trimming Calculator and Grab Counter: the last tonnes for the final trim, counted grab by grab, with an ETA for each hold
• Hatch by Hatch: a fair figure per hold when the shore figures don't add up to your survey

CARGO VOYAGE PLANNER
• How much she can lift, and which limit sets it
• Every limit on the passage in one answer: load line zones and seasons, channel depths with your under-keel clearance, berth drafts and air draft under bridges
• Load lines checked by displacement and at the mark amidships, using your certificate FWA
• Fuel, water and endurance to every waypoint, with ECA and port rates
• Enter the drafts and figures measured at any port, and the rest of the voyage is worked from them
• A passage plan report to print or share

AT THE SHIP'S SIDE
• Draft Reader: read the marks off a photo when you can't read them by eye
• Heel Meter: work out the seaside draft you can't read from the heel and the side you can
• Ballast Watch: live pumping progress from your soundings, with finish times and alarms
• Conditions: drafts in new water, and the most she may load in any zone

YOUR VESSEL, YOUR DATA
• Import hydrostatic and tank tables from Excel or CSV, and keep a profile for each ship
• Each ship keeps her own survey and plans; history is listed by vessel
• Back up everything to one file, and restore it on a new phone
• No account, no sign-up, no ads and no tracking. Works fully offline, and nothing leaves your phone.

On Android and iPhone. A full user manual is built in, and at marinershandapp.com/draftsurvey.

Planning tools are an aid to the officer's own calculation and judgement: check every figure before loading.

Recent changes:
• Load line zones are now checked at the mark amidships as well as by displacement, using your certificate FWA. Fresh and Tropical Fresh are worked for you.
• Each ship keeps her own survey and plans: switch vessels and come back to hers as you left it. History is listed by vessel.
• A density such as 1.0215 is shown and carried through exactly as read.
• Local time picked from a list of time zones.
• Many fixes across the survey, stowage, voyage planner, Ballast Watch and backup.