CHANGES IN scuba VERSION 1.11-1 OVERVIEW o We thank Aren Leishman for contributions. o Minor bug fixes. o Minor changes to placate the package checker. BUG FIXES o hm An error occurred if M0 was missing or NULL. [Spotted by Aren Leishman.] Fixed. o haldane An error occurred if progressive=FALSE and derived=TRUE. [Spotted by Aren Leishman.] Fixed. CHANGES IN scuba VERSION 1.11-0 SIGNIFICANT USER-VISIBLE CHANGES o Package 'scuba' now depends on R version 3.5.0 or later. o Internal changes to code to satisfy CRAN. o Minor corrections in help files. CHANGES IN scuba VERSION 1.10-0 SIGNIFICANT USER-VISIBLE CHANGES o Code now runs faster. o Improvements to documentation. o The package is now byte-compiled. CHANGES IN scuba VERSION 1.9-1 OVERVIEW o Updated package information (maintainer's address etc) CHANGES IN scuba VERSION 1.9-0 OVERVIEW o internal changes to satisfy CRAN. CHANGES IN scuba VERSION 1.8-0 SIGNIFICANT USER-VISIBLE CHANGES o whichtank<- The replacement value can be a single number or character string indicating that the entire dive is performed on a single tank. o whichtank<- Now issues warnings in some circumstances, to guard against common errors. CHANGES IN scuba VERSION 1.7-0 NEW FUNCTIONS o deco.ceiling Calculate decompression ceiling o END Equivalent Narcotic Depth, for trimix gases. SIGNIFICANT USER-VISIBLE CHANGES o haldane Calculation is now much faster (by a factor of 500 for a typical real dive profile). o haldane New argument 'derived' allows extra quantities to be calculated such as the washout and the decompression ceiling. BUG FIXES o showstates Additional arguments "..." were ignored after the first mouse click. Fixed. CHANGES IN scuba VERSION 1.6-0 NEW FUNCTIONS o ppO2 Calculates oxygen partial pressure. o Mmix, M0mix Calculate maximum tolerated inert gas tensions (M-values) for a mixture of inert gases. NEW DATASETS o deepmine Dive profile for a long, extremely deep, decompression dive, using mixed gases, in a flooded mine. SIGNIFICANT USER-VISIBLE CHANGES o datasets All datasets are now lazy-loaded, so it is no longer necessary to type 'data(pedro)', etc. o hm Changed default for 'mixrule' to something more sensible. Improved documentation for 'mixrule'. o dive Now allows begin=NA to suppress assumption that the diver descends from the surface at the beginning of dive; and allows end=NA to suppress assumption that the diver ascends to the surface at the end of dive. o introductory vignette Improved text. BUG FIXES o haldane There was a bug in the calculation of M-values at depth (not surfacing M-values). Consequently the results of 'haldane(relative=TRUE, deco=TRUE)' were wildly incorrect. [Spotted by Peter Buzzacott.] Fixed.